Even if You Slit My Mouth
Kuchi ga Saketemo Kimi ni wa / Kuchi ga Saketemo Kimi Niwa / Kuchi ga Saketemo Kimi ni wa (2020)

Miroku, the slit-mouthed woman, is set to marry secondary school student Kouichi to preserve her place in the world. His family has spent generations maintaining strange beliefs, and there seems to be another reason Kouichi is willing to marry her. Miroku would rather rely on her own strength than borrow anyone else’s. The two agree to pretend they are married for a year. If Miroku can frighten Kouichi during that trial period, their engagement will be called off.