Gal-sen (Japanese: ギャルせん, Hepburn: Gyaru sen) is a Japanese manga series written and illustrated by Meguru Ueno.

Sora Nezu is shocked to find that his childhood neighbor and crush Suzune Nekogami has become a sexy, tanned gal teacher at his high school.

While she is serious and strict with him during class time, she flirts with and gets him aroused outside of the classroom.

His female classmates and teachers also show erotic interest in him.

Written and illustrated by Meguru Ueno, Gal-sen started in Kodansha's seinen manga magazine Weekly Young Magazine on September 13, 2021.