>>4478445
She's also the homeroom teacher so there is a conflict of interest and potential abuse of power at play, so she wants it to be proper.
The other adult romances have no such hesitation.

>>4478448
There are no lolis involved here other than the twins and those are not a proper romance. Not even when they fuse back into Lavenza. Although there is a strong implication that she has a crush on Kasumi if you maxed the twins' Confidant beforehand.