Having been dumped 100 times and feeling utterly hopeless and unwanted, I finally received pity from my female friends who all had boyfriends, allowing me to do whatever I wanted with them! Real-life HUNTC-300

100 confessions, 100 rejections—the unpopular Tatsuya is heartbroken. His five girlfriends throw him a comforting karaoke party! They all have boyfriends. Tatsuya wants to hear their sex stories with their boyfriends to soothe his heartbreak...and from then on, the raging boyfriends and girlfriends begin "sweet erotic sex like with their boyfriends"!?