searching for this seductive(kinda) manga

[oginohusband]

so the mc is a highschooler, and there's a girl that always tried to seduce him by playing things with her lips. then later in the manga it turns out the girl is raped behind the scene by her brother. and the whole seductive gesture is there, because girl's brother want to see mc got ntr'd.

 

[KatoShuu]

@oginohusband
you sure it's not hentai?

 

[oginohusband]

im sure its not i still remember that me and other user shitting on this manga on this site @KatoShuu

 

[goarachnidlaser]

Could it be Boku Dake Shitteru Ichinomiya-san?
https://mangadex.org/title/20264/boku-dake-shitteru-ichinomiya-san

I haven't read it yet because 2bleak4me, but I once heard about it and the dominating incestuous brother thing was mentioned.

 

[oginohusband]

yeah that one @goarachnidlaser