It's probably a long shot, but I'd like to see Takumi build a healthier connection with Akira instead of this tangled situation he has with Kotori. Right now, his dynamic with her is worse than friends with benefits. At least in those arrangements, both parties hook up and move on with their lives. Takumi and Kotori are childhood friends with years of shared history and memories between them. Their relationship is much more meaningful and the fallout from a potential strife would be damaging to say the least.
The problem is that sex has become a cornerstone of their relationship, serving as validation for Kotori's femininity and a source of confidence she depends on. That strikes me as precarious territory. Their bond could easily unravel if circumstances shift. For instance, if Takumi ever tried to redefine boundaries, it could leave her feeling worthless rather than supported. There is real risk here that the foundation of who they are together gets eroded by dependency.
Thanks for the translation!