I do think this is very silly but I do like the idea that they all like one aspect (smell, taste, voice, touch) about Soraike, which does actually make them kinda not viable as final love interests imo, since you kinda have to love the entire person. The teacher doesn't seem to only like one specific aspect... And Watanabe. LOL what are the chances that Watanabe is end game, she has zero interest in Soraike, but what if that's better?
I feel like I rarely see this kinda of yuri harem that isn't just all sex all the time, so this is kinda refreshing. I am unfortunately very basic and rooting for sensei but Soraike really needs to learn some boundaries or sensei is gonna have a hard life.