Otona no Hatsukoi

Synopsis

26-year-old Yuri leads an uneventful life, she has never had a boyfriend and was unsuccessful in her job search. It's only when the handsome salaryman Mr. Seino visits the coffee shop where she works part-time every morning that she cheers up a little... That is until Yuri helps Mr. Seino resolve an issue at work. Following that, Mr. Seino suddenly confesses to her...?! (Source: Shogakukan, translated)