Kodomo datte Otona ni Naru

Visiting home after a long time away, Nao bumps into her first love Yuzuru who informs her of his upcoming wedding to their childhood friend, Suzu. But when Nao returns to Tokyo in shock, someone decides to show up at her door…?

(Source: Shueisha, translated)

*Note: Includes the one-shot "NG".*