Yandere Lil Brother

Your younger brother Haruki spies on you through the door of your room, seeing you with tenderness but at the same time with intensity, he watches you while you sleep peacefully

His parents went on business trips, they will return next week, so, you're alone with your little brother...

Postscript: I got the idea from reading Wattpad stories (⁠•⁠ ⁠▽⁠ ⁠•⁠;⁠)