I had to skip the sunbae's story but the rest were interesting, and the main couple comes back in the end. The yuri couple developed well and the long haired guy owns a bar with his cute lover he calls "moron" its all pretty good. Trust me the sunbae is just the boring bump.
I really like that there was a yuri couple too, but after chapter 46 ended, and the main couple left, I lost interest.