The ending is kind of lack-luster, the main female lead, and male lead do end up confessing to each other, on literally the last chapter, or so I felt like that happened, prettttty sure it did.
The used to be glasses girl and that one guy are still together, that silver haired girl was saddened about the f/m lead ending up together, yet was happy for her.
No sex at all, afaik, which is stupid imo.. and yeah I'm a degenerate, get over it.
Not sure on the teacher ship tbh, didn't really see anything about that, but I can't read it.. sooo idk.
But yeah, if anything I'd say this is filled with a butt load of drama, and filler (imo) and made the ending much, much, lack-luster.