I could see it being rushed but for story reasons the
6 month time jump kinda makes sense to give him time to develop more as a sprinter while growing taller, basically doing more of the same 30 chapters but to have a realistic progression and growth would take actual months
i can't read moonrunes however if you look at the images(ch32) you can see mc watching a recorded video or some shit featuring sister-in-law and someone who looks to be his brother (sister-in-law's husband) having sex.