He could have stayed as a girl being honest, and it not cause yuri content. The "I'm a girl now and I'm weak and unable to protect her" and the fact that he actually became weak after his transformation, and shy is the dumbest excuse. Even girls can be strong as a man irl. But anyway
This manga is pretty offensive towards lesbians. Like there needs to be a cure for us or we're just confused or we just need to meet the right guy... And that there must be a cause for us to be lesbians. It's really rather repulsive to write something so out of touch and shouldn't have ever been published. Its a ridiculous and pretty disgusting manga, if you ask me and I definitely don't appreciate it in the slightest.
I'm a bit sorry I read it now, I never thought this would turn into conversion fetish manga where a girl is cured from her "lesbianism" to end with a guy in the end, through reading it I really thought it would be other way around and the guy would accept turning into a girl for the other girl sake, but it looked in last chapter author had different idea and decided to promote the way of thinking that lesbians don't exist, they just fear men and a girl if she likes other girls must be cured from it and made to like guys now. Because a guy can't be turned into a girl because that would eb wrong and not heteronormative enough. This manga has nothing to do with yuri since the "girl" decided to be a guy again and other girl who was into girls decided to be with him even if he became a guy. Author is just a shitty troll.