I loved to watch one of the very few BLs with a age gap, 180 Degree Longitude Passes Through Us got ridiculous negative critiques for the age gap ... would it have been a male female love story and the female was the younger ... no problem. Those critics showed just their Medieval mindset.
The age gap between gay couples is often to be seen, similar often as within the heteros. It´s normal or standard.

The teachers lonelyness could be fealt, underlined by the music and how it was used. The student ... I fealt from the 1st view while watching what would happen and it did ... and satisfying enough they gor their happy end. Even one that was/is most realistic when 2 guys find themselves ... They want to unite ... and obviously they would do, while walking into the night.

The student attacked virtuous the walls of the professor which he had errected to protect himself ... but the young lad got a breach into and stormed the besieged fortress and was victorious ... He, that indicates the storyline and final talking, his prize ... a lucky uniting with the professor.