It's funny the guy has to """"work"""" really hard for the girls while his sister (a less deserving character) gets all the dudes barely breaking any sweat. I hope the upcoming arcs aren't a drag like this one felt.
It's honestly an Asia issue, where cheating/cucking only counts if it's a woman going from one man to another. They get (women) a free pass if it's the other way around (from a societal perspective, it may differ for some individuals over there.)