I was rewatching Arifureta but this got me curious.
Other than Cheat Magician, what other isekai got the MC classmate as the "main" heroine? And by classmate, I meant another Nipponese girl who got isekaied alongside him as well, not some isekaijin who got introduced during the cliched magic academy arc.
Most of the time, the MC always favors the Isekaijin over the Japanese. It's even more likely that the MC doesn't even let her join his group. And if he actually recruits her, she's pretty much the cuckquean of the party who went through constant humiliation ritual.