Boku ga Koisuru Cosmic Star

Overview

Eichi is in love with Haida-san, a cool and smart classmate. Just as he decides to confess his feelings to her, a beautiful alien girl who claims to be a "hero" falls on him from the sky. At the same time, the "symbol of wisdom", the source of the hero's special power, is transferred to Eichi. Eichi is unenthusiastic about being forced to become a hero. Until he sees Haida-san in mortal danger...! Before becoming a hero, he would like to enjoy his youth in peace! A romantic comedy about Eichi's struggle for love! (Source: Manga Cross, translated)

Source: AniList