Sensei, Kiite yo

Comedy Romance School

Uta thought that her homeroom teacher was a geek, but she saw him when he was dressed differently. Sensei was actually a handsome rock-n-roll singer!? Since Uta had always wanted to have a boyfriend, she threatened him to "go out with her" and she wouldn't tell anyone his secret! but she ends up really falling in love with her teacher...?! (Source: Chibi Manga) Included one-shot: Natsu wa Ginga no Ame ga Furu

Koisuru nante Kiite Nai

Romance Josei

Matsumoto Kanna is an office lady at a critical point(?) in her life, but for some reason she ends up being taught work by her contemporary, the boring, plain-faced Noda Haruki. (Source: MU) Included one-shots: Tadaima, Okaeri. Haru nanka Konai

Yowai 5000-nen no Soushoku Dragon, Iwarenaki Jaryuu Nintei: Yada Kono Ikenie, Hito no Hanashi wo Kiite Kurenai

Adventure Comedy Fantasy

A 5000-year old vegan dragon was living peacefully when one day a young girl showed up in his cave. She offered herself as a sacrifice in order to gain favor for her village. He played along as the great "Evil Dragon, the Demon Lord's Army Leader" in order to get rid of her. However, his little white lie awoken her hidden powers and his peaceful life suddenly ended. (Source: MangaDex)