Senpai Shrine

The Senpai Shrine is a little shrine in the shape of a temple that Yandere-chan has made in her bedroom.

As of the October 8th, 2015 Update, it is located in the south-east corner of the room. It contains a photo of the default male Senpai, a toothbrush, a bandage and a half-eaten apple. The player can use the mouse and arrow keys to select each object and read their descriptions.

YandereDev talked about an upcoming update where there will be collectible things from Senpai to put inside the Senpai Shrine. If the player stalks Senpai long enough, he will drop some objects that can be collected. This is a major reason why a male Shower Room will be implemented. Yandere-chan will be able to steal objects from Senpai in various places and store them in the shrine.

The shrine currently serves no purpose in the game other than being a decoration with collectibles.

Apple
In the final game, there will be one Senpai collectible available per week. Collecting Senpai's stuff is a low priority for the demo as it is only one week long.

Trivia

 * Before the shrine was added in the May 2nd, 2015 Build, it was just a bare table with the toothbrush, bandage, and an apple sitting on top.
 * The original Senpai Shrine was next to Yandere-chan's bed on the right.
 * Collectibles for the Senpai Shrine may one day give the player buffs.