*5 VolumesTake notes other romcoms! They solved this rival problem in 5 pages not 5 chapters
Eh, he doesn't seem the type to call someone he doesn't know well by their first name, and definitely seems the type to drop honorifics. I'd have stuck with Seki.TL Note from ShiroiElTsukai: This new girl's name is "関" Which is actually a typical last name "Seki." However, there were no Furigana indicating how it is read, and judging how the dude is using it without honorifics like it is her first name, I went with the Chinese reading of "Kan"
Very easy!Take notes other romcoms! They solved this rival problem in 5 pages not 5 chapters