
I think he’s a beta since omegas and betas get separated school right? And {SPOILER WARNING:}
Tsugumi gets into his heat while glasses dude, Megumi, and Tsugumi’s family goes to the water park. And while Tsugumi and glasses dude is changing, a Tsugumi went into his heat. And asked if glasses dude was a alpha or not, and the glasses guys nodded his head no. So hopefully glasses dude is a beta! I’m not 100% sure about my prediction though.
Source!:
https://qvfammaonline.blogspot.com/2020/12/megumi-to-tsugumi-vol-03-capitulo-05.html

So from what I could translate the guy in glasses is an alpha but pretending to be a beta and when the uke is in the locker room with him, the uke goes into heat and the guy in glasses falls on top of him and almost tried to bite his neck. Which in the end of the chapter the uke and seme decide to become official pairs
That glasses guy must be an omega, right.? He must be lying about his second gender since there’s a space in his answer.?