I'm used to solve sudoku with only 5-10 numbers. With that sudoku difficulty she showed us, I can solve within a minute each. Am I genius, chat? Is that real?
I'm searching for a good GL manga, unfortunately I found and read the epilogue first. So I'm screwed from the beginning. Anyway this one is truly a masterpiece. I hope MangaDex have ability to advise user to read the main story first if it's an epilogue/possibility of spoilers
How does this series have suggestive tags? Read this for the real deal suggestive https://mangadex.org/title/32f49758-8c0d-46f3-959f-78c8306359ca/onee-san-wa-joshi-shougakusei-ni-kyoumi-ga-arimasu