And the most mysterious element is Mafuyu. Some characters will also lose their motivation, their inspiration. The characters have their worries and that disturbs the progression rhythm. However it will be more complicated than expected.
But honestly, the series is all the more convincing because it is obvious that in order to play on a stage, it requires improvement in its instrument performances (or singing for Mafuyu) and that it is not only in 2-3 days that you can enter in perfect harmony. The series has a slow pace and takes time to explore his characters. You can guess that music has an important place in addition to the possible relationships that will be created within the group. Meanwhile, Uenoyama invites Mafuyu to join his band "the seasons" that he created with his elders (who are at the university) Haruki and Akihiko. Of course, I don't want to spoil you but their relationship will be more complex and will develop gradually. It would be difficult to perceive romantic relationships in the first episodes. Friendship although Mafuyu seems really attached to Uenoyama. Uenoyama decides to fix it and thus begin their relationship. Uenoyama, for example, is a bored character until he meets Mafuyu, who shows him his broken guitar. It is more a series that explores the characters, their worries, their inner struggles in their daily lives. You that Given is perhaps one of the most realistic series I've ever seen. But forget all your preconceptions because to be honest, Given is probably the most surprising series of its season. We can have the usual "uke" (the "passive") and "seme" ("active" character) relationships and it can relate harassing, non-consensual relationships and maybe beyond.
The "yaoi" often represents the fantasies of fujoshi / fudanshi rather than reality. I can understand that "shounen-ai" (and by extension "yaoi") can't be a genre that fascinates you. A simple "no thank you" and you will return to your other occupations. I think that many of you won't even try the first episode of this series because of its "shounen-ai" tag.