It doesn't flinch. A show about messy, uncomfortable love built on coincidence and bad timing, where every relationship feels like something that shouldn't work but does anyway. The animation is quiet, still frames and soft light instead of spectacle, because this isn't about grand moments; it's about the weight of choosing someone when you're tangled up with someone else. By episode three you'll either understand why people defend this show fiercely or you'll understand why they can't watch it. The soundtrack knows exactly when to break your ribs.

Natsuo spends his days pining for Hina, his cheerful teacher, convinced she will never return his feelings. When his friends talk him into going to a mixer, he meets Rui, a moody girl who seems as unenthusiastic as he is. One night together leaves them both unsatisfied, and they agree to go their separate ways as strangers. Everything changes when Natsuo's father announces he is remarrying. His new wife, Tsukiko, has two daughters of her own: Hina and Rui. Now Natsuo must face his feelings for his two new stepsisters, caught between the teacher he loves and the girl he shared his first night with, as he starts to see a darker side of love. The result is a romance drama with ecchi elements, built around awkward family ties and forbidden attraction.