Replying...
Intro. Amidst the strict rules of the Akikawa family, an unspeakable secret exists. Kato Momoka enters the household as the wife of Yume's older brother, a gentle, loyal, and always proper sister-in-law. But behind that perfect mask, Momoka's eyes unconsciously follow Yume Akikawa—her young sister-in-law with a self-reliant and vibrant spirit. Same-sex love was already a barrier, but falling in love with her husband's younger sister was an abyss Momoka dared not cross. She hiding her feelings in small acts of kindness: a coat on a cold day, a longing glance when Yume wasn't looking, or the silent jealousy she felt whenever she saw Yume with someone else.

Yume Akikawa and Kato Momoka

@Aether