What is this scene, where Akamatsu tells about his secret hiding place, a reference to?


In _Jinsei_ episode 11, Akamatsu tells the girls about his "Secret Place for
Hiding his _Dirty Stuff_ " and makes this face, with text written like this.

![計画通り - Just As Keikaku](https://i.stack.imgur.com/NWVlj.png)

I'm not sure what is this is a reference to. Can somebody explain? Thanks!




This is Yagami Light's [infamous
scene](https://www.youtube.com/watch?v=OkT4vAJnJls#t=7s) from _Death Note._

![All according to keikaku!](https://i.stack.imgur.com/eONclm.jpg) ![Keikaku
means plan.](https://i.stack.imgur.com/61maNm.jpg)




This is Yagami Light's [infamous
scene](https://www.youtube.com/watch?v=OkT4vAJnJls#t=7s) from _Death Note._

![All according to keikaku!](https://i.stack.imgur.com/eONclm.jpg) ![Keikaku
means plan.](https://i.stack.imgur.com/61maNm.jpg)

