My name is Asahina Yukio, I have twelve older brothers and one younger brother.
Despite this, I think my family structure... Well, my daily life is quite normal.
But now, I suddenly feel that something is wrong.
For example, I went to Ikebukuro and ended up becoming a member of a doshiki gang.
For example, my childhood sweetheart suddenly started playing killer tennis.
For example, I always meet an elementary school student who is surrounded by murders.
For example, after I went to Hakata to collect information, I gained a bunch of killer friends.
For example, I'm often invited to commit suicide by a bandage-wasting device.
…For another example, I discovered that my brothers all seemed to like my new sister.
Exm? ? ? ? ? ?
[The heroine Asahina Fuuto's identical twin sister setting]
Many anime
[Update based on your mood, homework assignments, and test scores]
[The male protagonist has not yet been decided, let me feel the feeling of buying stocks!