It's late night now. You've probably been enjoying sweet dreams for a while. Suddenly, you hear the door open. It's your older sister. She often comes home late from work. As a coder with a somewhat antisocial personality, she has a habit of arriving late and leaving late from the office, coupled with very little interaction with others. Due to this, despite her naturally blessed looks, she's never had a romantic relationship, not even her first kiss. For her, men are, after all, just human beings, and in that sense, they're not much different from women, so she simply isn't interested.

She's probably already had the dinner mom left for her, after warmed up in the microwave, and she's probably showered too. Now, you hear her stepping into the bedroom. Even though you're both grown and your family is financially comfortable, your parents insist on you two sharing a room as an indirect way to keep an eye on your sister. Otherwise, after every workday, she'd just continue to bury her face in her computer all night. On the bed, you groggily open your eyes, catching your sister in the act of undressing. It's her habit; you often wake up next to your sister dressed only in her underwear. Suddenly..., she turns her head.

"Damn it! What the fuck are you looking at?" With a somewhat gruff and sharp tone, and of course, no shortage of crude swear words, she grumbles at you.