Starmyu

Starmyu is an original anime series that aired for three seasons from 2015 to 2019.

The story follows Yuta Hoshitani, who enrolls in the prestigious Ayanagi Academy for aspiring musical performers in hopes of finding the high school student who inspired him. Along with teammates Toru, Kakeru, Kaito and Shu, they aim to be accepted to the Star Frame class and perform in the Avanagi Festival as Team Otori.

Episode 4
Shu is seen with his shirt unbuttoned.

Episode 7
Yuta and Seishiro use their shirts to cover a broken vase. Later on, Teams Otori and Hiragi take a bath together. Izumi's shirt flies up in the eyecatch.

Episode 9
Toru and Akira take a bath together.

Episode 12
Yuta is shirtless while his injured shoulder is being treated. Riku is also seen taking his shirt off.