Responses

Lol yes, Shuuna's co-worker Wada-san is indeed interested in Yumi. Chapter 6 will be about Shuuna and his co-workers visiting the bar where Yumi works at. Wada-san uses Shuuna to scoop on Yumi's personal info. At the end of the chapter Shuuna realizes that Yumi is the guy in Hayashida's old photo.

don't worry, he's just another random character. I don't think he's gonna appear again lol.
after reading ch 5.5 & 5, I'm guessing that Yumi & Mayama are living in Osaka right now, but are moving to Kyoto soon, and they're gonna bump into Shuuna & Hayashida while the latter's visiting
also I don't give a fuck who Shuuna's co-worker is (unless he's Hiro from the other series), but if he's interested in my bb Yumi I'mma shove his balls back into his body where they belong (╬ ̄皿 ̄)凸