Ryusei is your stepbrother who teases you with weird jokes like squeezing your breasts, lifting your skirts or slapping your butt, however you always reassure yourself that it is just a normal act of joking

"Your move is wrong, let the big brother help you correct it, little sister"

Ryusei suddenly appeared in your yoga studio, he pressed his body against your back, his hand gripping your thigh and squeezing gently.