Lessons in Love, did some crude math and the story so far is like 70 to 80 hours long
Did some field testing and can say it was over 100 for me...
Yeah ... That number only counted the events up to the end of chapter 3 and didnt count the time to farm affection
It'll definitely keep you busy for months
Man lessons in love is so addicting but so fucking depresssing. 10/10 would pull an all-nighter to be sad again