This Drama Series Story had lots of potential to grow But the scriptwriter and director messed it up. There were lots of loopholes, and all the situations/scenes with supporting roles were left open. lots of the time you will be waiting for what will happen next but they totally cut down the scene from the last episode and just turn the story on the main character. character development was not enough. it felt like the main characters turned from classmates to good friends who live together. There was the potential of chemistry BUT dialogues between them were too general like close friends talking. Till the end, I was expecting to something happen but nothing happened, Simply put just too general.
This is not the fault of the actors but only the production's fault.

In Japanese setting dramas, they highlight the features of adults (teachers/parents' authority & strictness and feel proud in it but if you compare with Thai setting dramas they mainly focus on the main characters and the close relationship of the main characters, remaining actors, and situation become backdrops. which helps the audience to focus more on the story, production, and other things)