DLC where Ima properly confronts and kills Kako-G/X. I don't know how (I have some ideas) but him going on this quest for vengeance and becoming his own person along the way, culminating in him hesitating because Kako-G is still technically his sister before killing her, not for revenge, but to protect his friends. Also timeline shenanigans where he finds a normal Kako and tries taking the place of the Ima from her timeline and lets her have more freedoms because he believes his controlling nature led her to meet Shouma alone in Mystery

>>530755662
You know damn well Ima was at those freak offs
To support Kako, of course