The reader who hates this manga really didn't know how this mangaka plot in their mamga... And it is psychological, that's why they got this kinda plot... Cheater, r*pe and so on(maybe not in this manga for the r*pe) and anyway... Who tf just say straight man in here? You didn't know other sexuality such as bisexual?? Grow up dear... Yes it cheating but this is psychological... So it really not weird this kinda plot here... Especially from this mangaka... They really like to put this kinda drama into their work just like harada.. Maybe this is not your taste... But dont mad at author because of this is not your cuppa tea..
Gozen 2ji Made Kimi no Mono