Bokutachi no Koi ni Happy End nante Iranai

Daiki Tomita likes movies, but the real reason he's still kept up with his university's film club members after they all graduated is his unrequited love for fellow member Koharu Kobayakawa. He's been hesitant to risk their friendship by asking her out, but when Koharu breaks the news that she doesn't have long to live, Tomita must decide whether or not he's willing to let her go without ever telling her how he truly feels...

(Source: Kodansha USA)