No yaoi, Yuri, hentai, ecchi, mecha plz

What I'm looking for is a manga where the male MC has a dark past. To be precise , I want him to be suffering from past sexual abuse or rape or it may be in the present too. But preferably it must be in the past. The MC can have a poker face or a fake-smiley face to cover up his pain (here, the dark past doesn't necessarily have to be rape or sexual abuse). I've referred to other threads and recs but I read them all. Plz i need a few.

His bestie or his rival counterpart have a clue that the MC is suffering.

Manga I read are:
Switch
D. Gray man
owari no seraph
kuroshitsuji
nabari no Ou

Well, the non-BL chemistry is a bonus 😀

Thankyou.

Rikudou