I am looking for specific VN (I think) game, unfortunately I am unable to remember the name, tags or anything other distinguishing features that were associated with the game. The plot was along the lines of the MC and his classmate traveling home from school in a train and circumstances lead their interaction with her having to pee and him helping her pee in bottle, their relationship progresses from this incident and then they go on a date to an amusement park where they make like bunnies. Great CG and a good sound track also. Would be great if anyone could point out any possible references.