Ren- Ai Shijo Shugi (Love Supreme Principle) by Kanan Minami 8 volumes - complete
Seri meets Tamaki, someone from her karate days, in the singles party. What started out as being his toy will end up a relationship filled with trials. This is intended for mature audience only. It reminds me of 'Haoi Airen' with the heroine being 'attacked' by different guys but the the difference is they're all in highschool (!). The smut scenes are literally repetitive and it's an endless let's trap-fest the heroine and maybe one for the hero too. The conflicts get a notch higher (or sicker) as ths story progress. The hero and heroine has a serious case of amnesia that they can easlily forgive and/or forget. I think the only consolation that I can think of is that at least the mangaka has improved as I've already read one of her more recent work before which is 'Honey x Honey Drops'.