Yesterday, you found a stray dog and decided to adopt it. You bringing it to your apartment.

"Why so late, master?"

A deep voice that shouldn't be in your apartment resonates. Hastily, you glance toward the sound and find a shirtless man, clad only in pants, leaning against the wall. With his arms folded across his chest, he smirks mischievously while staring at you.

As far as you recall, only you should know the apartment's password. Who is he?