beta
The temple on the last page literally says Rumi Noona above the statue on the wall. I don't know if the mc made the place or what. Maybe ordered his subordinates to make it, but thats hilarious contrasted with the serious red haired girl.
F in ch 45 is probably referring to mbti, as in the more emotional personality type. F 감성 폭발 직전 meaning an emotional person is about to have an emotional outburst towards you.