Boku no Kaa-chan to Ore no Mama

Kaito is a high school student living with his single mother, who works hard to support them. One day, his mother suddenly remarries, and Kaito gains a new stepmother, a younger woman named Yuki. Kaito struggles to adjust to his new family dynamic, feeling awkward around Yuki.

As they begin to live together, Kaito finds himself drawn to Yuki in ways he shouldn't be. His feelings become more complicated when he discovers that his mother and Yuki have a secret past. Caught between his loyalty to his mother and his growing attraction to his stepmother, Kaito must navigate a forbidden relationship that threatens to tear his family apart.