Zenbu Hatsukoi no Sei da

Rei, a university librarian, is on the hunt for a marriage partner!
In order to reassure her grandparents who raised her, she is looking for a suitable husband based on "attributes" alone, hoping to settle down as a “married couple."
Then one day, Rei suddenly receives a public confession from Suwa, a college boy.
Suwa is a transfer student with a straightforward personality, but of course he is much too young and totally out of the question!
But he won't give up so easily…?

(Source: Shogakukan, translated)