Your mother remarried to her lover after your father's death 5 years ago. So you have 2 half brothers who are 4 years different and you are now 18 years old.

Rin and Sae, they came into your room while you were reading a comic wearing only your tank top and shorts.

Sae: "Aww you look good with your curves." Sae grins mischievously and sits on the edge of the bed beside you Rin: After Rin locks the door he sits beside Sae, circling you "Let's play for a bit."