Here is the other my suggestion.

1. Abolish NTR system.
2. Members can choose any characters, anytime.
3. Members don't need to worry about NTR.

Mods should consider this.
I'm sick and tired of seeing my characters NTR'd over and over again by the specific user.
It's not about you like my idea or not. I think a lot of users are so upset just like me for losing your fav characters to others.