Kutabire Salaryman no Ore, 7-nenburi ni Saikai shita Bishoujo JK to Dousei wo Hajimeru

A third‑year working adult, salaryman Yuuya Amae, was completely worn out from the busyness of daily life. At that time, he unexpectedly reunites—after seven years—with Aoi Shiratori, a girl eight years younger who used to live in his neighborhood. Now grown into a high‑school girl who is skilled at all household tasks, she says: "Yuuya‑kun... will you live with me, with marriage in mind?" Aoi strongly wishes to live together with Yuuya, her first love. Confused, Yuuya agrees for the time being to live with her only in the role of a guardian—but inside, he is completely shaken by Aoi's bold advances...! (Source: Hobby Japan, translated)