Normally I dock the ecchi/harem genre because one can see what going to happen from a mile away and honestly most of the time people are just there for the fanservice and not the spineless harem protagonist but Hensuki does manage to differentiate itself by not dancing around anything plus the English dub is so Fantastic that it managed to salvage my time spent on this show which is otherwise still pretty mid.
the MC is trying to find the girl who left him a love letter and in the course of that investigation finds that all the girls have some sort of sexual kink. It is pretty fun most of the time and I do think it's a huge step in an otherwise very reserved Japanese society.
A fun watch all around, Watch it dubbed if you can as it's fantastic