×
Create a new article
Write your page title here:
We currently have 1,388 articles on World Trigger Wiki. Type your article name above or create one of the articles listed here!



    World Trigger Wiki
    (Redirected from 001)
    This page is about Chapter 1. For other uses, see Osamu Mikumo (disambiguation).
    Chapter 001.jpg

    Osamu Mikumo (()(くも) (おさむ) Mikumo Osamu ?) is Chapter 1 of the World Trigger Manga.


    Short summary[edit source]

    In Mikado City, Yūma Kuga transfers to the Third Mikado City Middle School, where he meets Osamu Mikumo and gets in trouble with the class' bullies. When Osamu and Yūma go home together, the bullies challenge Yūma to a fight, but Osamu tries defending him, getting beaten. After Yūma breaks the leader's leg, a Neighbor attacks. Osamu, revealing to be a Border agent, tries to defeat it but is thrown away. Yūma then takes on the Bamster with his own Trigger, quickly defeating it. After the battle, Yūma reveals that he himself is a Neighbor.

    Long Summary[edit source]

    The chapter begins as an unknown Border agent stands above a large monster he just defeated. He calls out to the boy he saved, Osamu Mikumo, asking if he's alright.

    The history of Mikado City is narrated, where a gate between another world suddenly appeared four years ago. Monsters called Neighbors began to pour out and destroy the city. A mysterious group appeared and saved the city. This group created an organization called Border to defend the world using Neighbor technology. After 4 years, the situation in the city is stabilized, and although gates are still opening, the citizens learned to convive with them, as they feel safe with Border around. In this situation, at Mikado City's Third Middle School, Class 3-1, a group of bullies teases a boy in class, throwing his pencil case back and forth like a volleyball. Osamu, who was sitting quietly until then, intervenes and returns the pencil case to its owner. He overhears some of his classmates talking about the new transfer student and is highly interested when they mention the new student might be a member of Border.

    A commotion is heard on the street in Mikado City, where a young boy, Yūma Kuga, has just been hit by a car. The boy is completely unharmed; however, to the amazement of all the people surrounding him. When questioned about his address, Replica, a small black creature, appears from inside his collar and whispers the answer into his ear. Afterward, Yūma walks down the street, talking to Replica. Replica scolds Yūma for not being careful, and Yūma asks Replica if he can use his Trigger. Replica replies it is up to him and reminds him he is late.

    At school, Yūma looks inside a class, where students are taking turns reading. He is surprised that they all dress the same, questioning if it's fashion, but Replica explains it's a way to identify the students of the institution. The class' teacher goes outside and asks Yūma where is he from, and he's then taken to class 3-1. There, he introduces himself, and one of the bullies points out that he's wearing a ring. The school principal, Moribayashi, tries to take it for him, explaining that wearing accessories is against school regulations. Surprised by that, Yūma apologizes and leaves, but Moribayashi tries to stop him. Osamu defends Yūma, saying he must have a good reason for not wanting to take it off. Moribayashi then asks him the reason why, and Yūma explains the ring was a memento from his parents, and one of the bullies says so is the manga that was confiscated from him, causing Moribayashi to tell him to shut up. After a chilling stare from Yūma, the Moribayashi commovedly allows him to keep the ring, and calls their homeroom teacher, Mizunuma, to his room. Mizunuma tells Yūma to sit next to Osamu, and asks Osamu to take care of him.

    Other students begin to question Yūma about his hair, while Osamu muses on his suspicions about Yūma being a part of Border, but figures he was wrong. The bullies from earlier throw crumpled paper balls at the back of Yūma's head, claiming it is a normal Japanese greeting. Yūma, seeing though his lies, makes a more crumpled paper and flicks it into the ringleader's forehead, knocking him over. Yūma claims he is returning the greeting, with Osamu is amazed by Yūma's fighting ability. Mizunuma returns and resumes classes before the bullies can retaliate. Osamu decides to keep an eye on Yūma and asks if they can walk home together. He warns Yūma about embarrassing the bullies and predicts they will retaliate.

    Just then, the bullies show up and demand that Yūma comes with them. Yūma readily agrees, not realizing their motives, and starts to follow them. They tell Osamu to leave, but he grabs one by the shoulder and demands they let Yūma go. In an abandoned lot, Osamu is punched several times by the ringleader and challenges them to fight him one-on-one. Osamu warns them about being in a Forbidden Zone and that a Neighbor could attack at any time. The ringleader ignores Osamu, saying he doesn't care about Border, and continues to hurt Osamu. Yūma doesn't make any motion helps him, coldly refusing to help when questioned, as it was Osamu's fault for inserting himself into the situation. The ringleader turns on Yūma, who easily blocks his attack and knocks him to the ground by breaking his leg. Just as the rest group lunges to attack Yūma in retaliation, warning sirens begin to sound, and a gate appears above their heads, with a Neighbor coming out of it. The bullies attempt to flee, but the ringleader is picked up by the large Neighbor that steps out of the gate. As he is dangling in the Neighbor's mouth, Yūma calmly suggests that they leave. Osamu; however, says he has to save them. Yūma says they got what they deserve and asks why Osamu wants to save them, but Osamu declares it's just because it's the right thing to do.

    Osamu reveals he's a Border agent, activating his Trigger, Raygust, and his clothes transform into a white outfit. He jumps up and strikes the Bamster, freeing the bullies. However, he is not strong enough to pierce the Bamster's skin, and is thrown away. Yūma again asks Replica if he can use his Trigger, and Replica again states it is Yūma's decision. Yūma activates his Trigger, and his clothes transform into a black bodysuit, to which Replica fuses itself, as Yūma leaps through the air. He easily destroys the Bamster, to the amazement of Osamu. After they both revert back to their school uniforms, Osamu questions Yūma about his Trigger and asks if he is affiliated with Border. Yūma says he isn't a Border agent. Osamu is confused, then, why Yūma has a Trigger. Yūma explains it was his given to him by his father, and he was told by his father to travel to Japan in the event of his death to find his friend who works at Border. Yūma explains his father had nothing to do with Border, either. Osamu is even more confused, since only Border agents have access to Triggers. Yūma says that rule only applies to "the world on this side". He smiles as he explains that he came from across the gate and is what is called a Neighbor, ending the chapter.

    Characters in order of appearance[edit source]

    Characters in italic are only seen briefly and have yet to make a proper appearance.

    Triggers in Order of Appearance[edit source]

    Trivia[edit source]

    Navigation[edit source]

    Introduction Arc
    Chapters 12345678910111213141516
    Volumes 12
    Episodes 12345678
    Manga
    Volumes Chapters
    1 1 • 2 • 3 • 4 • 5 • 6 • 7
    2 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16
    3 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25
    4 26 • 27 • 28 • 29 • 30 • 31 • 32 • 33 • 34
    5 35 • 36 • 37 • 38 • 39 • 40 • 41 • 42 • 43
    6 44 • 45 • 46 • 47 • 48 • 49 • 50 • 51 • 52
    7 53 • 54 • 55 • 56 • 57 • 58 • 59 • 60 • 61
    8 62 • 63 • 64 • 65 • 66 • 67 • 68 • 69 • 70
    9 71 • 72 • 73 • 74 • 75 • 76 • 77 • 78 • 79
    10 80 • 81 • 82 • 83 • 84 • 85 • 86 • 87 • 88
    11 89 • 90 • 91 • 92 • 93 • 94 • 95 • 96 • 97
    12 98 • 99 • 100 • 101 • 102 • 103 • 104 • 105 • 106
    13 107 • 108 • 109 • 110 • 111 • 112 • 113 • 114 • 115
    14 116 • 117 • 118 • 119 • 120 • 121 • 122 • 123 • 124
    15 125 • 126 • 127 • 128 • 129 • 130 • 131 • 132 • 133
    16 134 • 135 • 136 • 137 • 138 • 139 • 140 • 141 • 142
    17 143 • 144 • 145 • 146 • 147 • 148 • 149 • 150 • 151
    18 152 • 153 • 154 • 155 • 156 • 157 • 158 • 159 • 160
    19 161 • 162 • 163 • 164 • 165 • 166 • 167 • 168 • 169
    20 170 • 171 • 172 • 173 • 174 • 175 • 176 • 177 • 178
    21 179 • 180 • 181 • 182 • 183 • 184 • 185 • 186 • 187
    22 188 • 189 • 190 • 191 • 192 • 193 • 194 • 195 • 196
    23 197 • 198 • 199 • 200 • 201 • 202 • 203 • 204 • 205
    24 206 • 207 • 208 • 209 • 210 • 211 • 212 • 213
    25 214 • 215 • 216 • 217 • 218 • 219 • 220 • 221 • 222 • 223
    26 224 • 225 • 226 • 227 • 228 • 229 • 230 • 231
    Chapters not yet in tankōbon format
    232 • 233 • 234 • 235 • 236 • 237 • 238 • 239 • 240
    Cookies help us deliver our services. By using our services, you agree to our use of cookies.

    Recent changes

  • Desk gun • 6 hours ago
  • Desk gun • 6 hours ago
  • Desk gun • 6 hours ago
  • Desk gun • 7 hours ago
  • Welcome to WorldTriggerWiki.com!

    We have completed moving the wiki here from FANDOM. This is the wiki that will be maintained and updated in the future (more information). Enjoy your stay!


    If you would like to get involved, or if you have questions or feedback, check out the Community Portal.

    Sexiest Gunner?
    Yuba (50%)
    {{PLURAL:5|one vote|5 votes}}
    Suwa (30%)
    {{PLURAL:3|one vote|3 votes}}
    Wakamura (0%)
    {{PLURAL:0|one vote|0 votes}}
    Inukai (20%)
    {{PLURAL:2|one vote|2 votes}}
    (based on {{PLURAL:10|one vote|10 votes}})
    Created {{PLURAL:69|one day|69 days}} ago
    Past poll results
    Cookies help us deliver our services. By using our services, you agree to our use of cookies.