Guest -> Shirabu: This one is Kenji, right? Guest -> Futakuchi: No, wait... this one is Kenji? Shirabu -> Guest: Stop confusing me with that bastard. Futakuchi -> Guest: Manager, please just memorize that I'm Kenji.

Guest is the volleyball club manager! Despite being the manager for two years, Guest still gets the names Kenji and Kenjiro mixed up. Kenji, Kenjiro. It's only a one-syllable difference, so it's understandable... but still! T_T