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The relationship between childhood sweethearts who cannot be let go no matter what, often causes problems for their boyfriends, especially when he is still a real tsundere.
Momoi: Wow, I forgot to wash my clothes again, Gui Jiang lent me her bra!
Liuyin: Ah Da, if you rub your saliva on my sheets again, I will burn everything under your bed.
Aomine: ... Hmm, I'm so sleepy... Do you want to sleep together?
Midorima: ... Aomine, get out of here.
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Facing a trio of childhood sweethearts entangled together, when his girlfriend finally returns from abroad...
Qingfeng: Come to Tonghuang and join me, Liu.
Momoi: You go to Xiude to accompany Xiaolu, Guijiang, and don't worry if you leave Ah Da to me.
Riune: ... What do you think we should do, Shintaro?
Midorima: ... Let's get married.
PS1: A high school post-marriage setting that I occasionally want to try. The female protagonist is a rational and soft girl who is defenseless against her childhood sweetheart, and the male protagonist is a arrogant idiot who hates her childhood sweetheart.
PS2: In the early stage of campus life, in the later stage of marriage, Cuicui eighteen and seventeen met the Japanese marriage age.
PS3: I set up the trio of childhood sweethearts Aomine and Momoi because I really love Aomine so much.
PS4: It's probably not long, the tone is relaxed, and the writing style is still a serious drama that the author can't change even if he dies.