
But they're quite relevant-- the first chapter literally introduces the next characters in another story, and is the catalyst for what happens ie Koga and Tatsu meet up and get together because of Minori. The second chapter (Umehara) is relevant in that it sets up who Minori has been thinking of all this time, and is the reason they get to meet-- the shop is shown on the TV series Umehara was a part of, which Souta sees.
It seems a lot of people either 1.) Don't care about the story universe and just want the main couple, or 2.) Dislike the fact that Minori was having sexual escapades with other people. Granted, Minori shouldn't have been assaulting customers in the first place without consent, but he's free to have sexual relations bearing in mind it's been 6 years since he was with Souta.
The first two clients were just a weird show. They should've started with the soccer player.