Anime where the mc is groomed/manipulated by someone using them for a goal

In my defence this is a pretty common trope in shows like breaking bad, the wire and the sopranos. Basically I’m looking for something like chainsaw man

Basically something where the mc has a gift that’s being exploited or the maybe the person just needs a partner

More examples would probably be darling in the franxxx, Glepiner, future diary, FLCL and guilty crown. Doesn’t have to fit perfectly. It can be like in chainsaw man where it can be a Fmc seducing the mc or it can be more like breaking bad

Any genre but it would be interesting if there was lesser known interesting dark romcoms or action shows

Looking for underrated lesser known anime’s from 2000s of 2010 or even overlooked modern stuff