She's Adopted a High School Boy! Vol. 3 (Kodansha, 2021)

“If you're happy, I'm happy.” Minoru Soramoto and the mysterious lady next door who paid back his family's debt and offered to take him in are about to start living together under tantalizing circumstances! Minoru has been through a lot, but now the lady next door is seeing to his every need. Though some of her quirks flare up from time to time, he is living the good life for the most part. Furthermore, her name finally comes to light! But, a new arrival may put a wrinkle in his life of luxury!