So you force him to join. Ur side don't accept him so u want him to prove himself? u force him u know? Is not that ur job to Make ur Knights to accept him? For achievements he Already did ut that's why u give him the offer
@Kagami Yato She's squeezing him using threat of investigation. Corruption with the power of law behind it commandeering a useful law breaker. Plenty of examples of this pattern in the real world, minus the harem and perfect success record.
Unfortunately for MC, she is more competent than his previous corrupt benefactor, and thus it's a less desirable arrangement for him.