Well from what i have played. I had one event at start of the day when ntr guy send some other guys to fuck his target heroine with make her unavaible for the day so i image if we gonna have whole team cucked and those kind of events are for all of them implemented in full versio it gonna make harder to build specific team due characters getting fucked randomly.
Im not sure if black heart metter unlock those but there are those events for 3 characters when they got defeated and raped with give bonuses to themi had one of those team up to 4th event at with they totaly loved those ugly bastard you see single cg for those only as picture they take.
So as now pro for ntr mean stats bonuses cons girls can become unavaible randomly.
As now i love this game except for random crashes .
Well there are also some bonuses for getting about 300 love points. Seems they get some skill buffs etc. however, for a H-game, kinda wanted some repeatable love specific scenes. Its possible they might be added in future updates, so fingers crossed.