The girl just got half naked in front of him, embraced him and he acted like nothing happened. Even in fiction you should have a limit or it will feel like you're calling the readers idiots.
What? You expect the author to submit to us readers outside of japan with enough common sense to call this bullshit and not those dirty otaku’s who have no social interaction with anyone? Beat me.
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Poor girl.
Everything she did in her life was only to be with him because she love him, and this guy don't care at all, and he will fall for a copy of his 2d waifu.