Cool Sister Observation Diary – Secret Masturbation Caught on Camera

Synopsis

I have an older sister.

My sister Rikka is normally quiet and cold, just like a cool, melancholic heroine from anime.

(If only this were 2D… sigh…)

Then one day, something felt off about my room.

I decided to set up a fixed-point camera to observe it.

When I played back the footage, I couldn’t believe what I saw…!

—

I have a younger brother named Haruomi.

I love him so much that I act cold to him normally.

(Today… Haruomi is away from home)

After confirming the house is empty, I enter his room.

(His scent…)

As always, I remove my clothes and become naked.

Feeling his presence all over my body, I reach down between my legs as always and…