Shou Tobishima

Shou Tobishima (飛島 翔, Tobishima Shō) is a man who worms his way into a lady's good graces, then sets up his bag to take upskirt footage while on a date with her. Remi falls for his ploy at one point, but is rescued by Chū-san, who had recognized Tobishima's name from his last school. After Chū-san threatens him, he flees.

Manga Debut: Chapter 93 (Oneesan is Popular?)
Anime Debut: Episode 45 (Whispered Oneesan Instruct-son)

(source: SKET Dance Wikia)