Koigakubo-kun Stole My First Time Vol. 9 (Kodansha, 2026)

"Eiko-san, I always want you by my side..." Introverted, nerdy Eiko is pushing thirty, but has never once had a boyfriend... until now. An extroverted catch who's six years her junior is her first boyfriend, and they've just started a trial run of living together. But when his perfect younger coworker throws down the gauntlet for his heart, Eiko starts getting insecure... Eiko is putting in the extra miles and doing everything she can to keep her man, but suddenly, he throws an unexpected curve ball at her! As their relationship is getting serious, Koigakubo-kun reveals that he's been seriously considered for... an overseas job assignment?!