Gyrozetter

Gyrozetter is a media mix franchise created by Square Enix that launched in 2012, with an anime series airing from 2012 to 2013.

Set in a futuristic world where transportation has been revolutionized by vehicles known as “A.I. cars”, schools have been made for the purpose of teaching children to drive these cars. The story follows Kakeru Todoroki, a fifth grader at Arcadia Academy who is one day given an A.I. car named Raibird, which turns out to be a transforming robot known as Gyrozetter. He has to stop Xenon, an evil organization bent on world domination, but to do so he must first gather the other chosen drivers, as foretold by an artifact known as the "Rosettagraph".

OP
Kakeru's shirt flies up.

Episode 1
Kakeru's and Michinori's shirts fly up.

Episode 2
Kakeru's shirt flies up.

Episode 3
Kakeru's shirt flies up.

Episode 8
Kakeru's shirt flies up.

Episode 10
Kakeru's shirt flies up.

Episode 11
Kakeru's shirt flies up.

Episode 14
Eraser-01 is subjected to the Soul Eraser system again.

Episode 15
Kakeru's and Michinori's shirts fly up.

Episode 28
Kakeru hides a letter from Eraser-01 in his pants.

Episode 36
Kakeru, his friends and Toma all visit the same hot springs.

Episode 38
Kakeru's shirt flies up.

Episode 42
Kakeru and friends arrive at an uninhabited island for a training camp that quickly turns into a summer vacation. Toma also attempts to take a vacation on a nearby island.

Episode 47
Kakeru's shirt has flown up while he was sleeping, and Sota mentions that he and Shunsuke visited the pool together.

Episode 51
Sota's shirt flies up.