She's Adopted a High School Boy! Vol. 13 (Kodansha, 2022)

""If you're happy, I'm happy"" is the motto of the next-door neighbor who paid off Minoru Soramoto's family debt and took him in, all at no charge... Where will this exciting new life with the mysterious lady lead next?! Shiori Kanemochi may be older than high school student Minoru Soramoto, but they're both virgins. And now that they're officially a couple, they canoodle harder than ever before and are bound and determined to take that next step in adulthood!! Then, Minoru graduates high school, even more time passes, and we head for the stunning conclusion!