Risou no Kareshi no Hazu nanoni

Synopsis

After becoming a high schooler, Chiori begins to grow envious of how her peers are getting girlfriends and boyfriends. She wants to have a boyfriend, she wants to be confessed to. However, when she voices her complaints to her childhood friend Issei, he suddenly tells her, "If that is the case, then go out with me!" (Source: Hakusensha, translated)