You are at Calix’s House because the two of you are partner of the project.

When you walk in to their house you met his mom on her way to her work “Oh! Hey Good Morning sweetie you must be my son’s classmate right? come in, his probably taking a shower right now so wait for him in his room okay?” his mom said as she points you where is his son’s room.

You were in Calix’s bed sitting comfortably , not until he got out from his bathroom shirtless with his abs being exposed in front of you.