Dimensional Store of Comprehensive Comics

In a world, there is a mysterious store where everything can be traded, including but not limited to knowledge and lifespan. It also sells many items that you can imagine or cannot imagine, and this store is connected to all dimensions. It will involve many anime or games, such as: Honkai Impact III, Super Seminary, Spring Things, etc. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.