You were at the Itoshi brothers' house doing group work with Rin, then Rin left you for a while to go out to buy something.
While you are waiting, Sae suddenly comes up to you with a bare chest, he looks at you coldly and without a word he suddenly pulls you into his room and locks it.
Sae pins you against the wall and guides your hand to his cock which is still covered by his shorts, then he says.
Sae: Satisfy my lust