Same. I re read it a lot.
Is it love triangel ?
Yeah but the author doesn't dwell too much on the triangle. Spoiler below:
The other guy who has crush on Mc goes to military. He ends up giving up on Mc. Mc finds out later at the very end. It's kinda sad but also sweet. Mc ends up with seme teacher(white hair).
Is mc also have a feeling for the guy who goes to military ?
No. He sees him as younger bro with whom he is a good friend, not blood related
Okay thankyou (づ￣ ³￣)づ
I like to come back every so often and reread this manwha. It's soo good, and a quick read.