Only ntr that doesn't annoy me. Figured she was using them especially nice guy. A good guy needs a good friend that will take care of the scummy things to keep him good lol
So the MC is will play bad guy to look out both of their backs, huh? Sounds like he is a loyal friend although his method is questionable to some people.
So I don't think the drain skill actually steals their skills, it just copies them. Or else she'd notice she can't appraise anymore.
Also he can select when to use his skill, and what to drain (everything, EXP, or skills).