If Sensei was easy to get there would be no manga. The point is that Eiko is actively pursuing Sensei, while Kamu is comfortable with her current position as Eiko's daughter (Some of /u/ even call her just Eiko's pet because she grows cat ears every time she's with her). There is no #KamuTeam because Kamu isn't trying to win, she's okay not winning Eiko romantically, just having her. The romantic goal for Eiko is and will always be Sensei.
And I know you're gonna hate chapter 78 when it drops, so please don't explode when it happens, neither here nor the comment section for chapters is the correct place to explain why you hate the couple. It's what the author wants and she's gonna make it work.
That's precisely why i don't follow hardly this manga, because of the Sensei/EIko that doens't make any sense to me.But since the author decide it, i justtry to bear myself with it. I rather have a threeway than Eiko/Sensei. I find this ship forced down the throat, Sensei reject countless time and don't seem interested in the slightest so for me it's a no-go. If what you said it's true then i consider myself dropping it because i hate this ship.
Someone already told me to reread it to try appreciate it but since i really prefer the Eiko/Kamu way (which i don't really think Kamu is satisfied with justfriend honestly) i can't bring myself to remotely even like it in the slightest.