Kiyomi, a popular hostess at a bar in Shinjuku, has a traumatic childhood that makes her only sensitive to sexual intercourse with women. One day, the girl she loved as a junior hostess betrayed her and slept with her man. Uncomfortable with men, Kiyomi "swaps places" during sex with her new girlfriend, a trans woman Kaoru.
Reincarnated as a sentient weapon with memories of his past life, but not his name, a magical sword saves a young beastgirl from a life of slavery. Fran, the cat-eared girl, becomes his wielder, and wants only to grow stronger, while the sword wants to know why he is here. Together, the strange duo's journey has only just begun!
Mukai Naoya has loved Saki Saki since grade school, and when she finally accepts his feelings, he's at his happiest. But one day, a cute girl named Minase Nagisa confesses to him! Not wishing to choose only one over another, Naoya chooses to go out with both of them!! What will be of this love triangle that challenges morality itself?