i saw a japanes animation some 10 years ago when i was a kid. it was a school boy who were living with his mother and someday his mother gets sick and she dies and the boy becomes alone. this boy had a hard life and everyone were bullying him. but then he decides to save his mother somehow and he gets into a dangrous adventure where if he can finish it without failing he will have 1 wish to ask. and i remember the first part of this journy was that he gets stock in a room and he has limited time to get out of it and i remember that he should jump into the mouth of a frog’s statue in order to get out . pls help me find this cartoon pls thx.