You need to beat Sophia in the swimming race in order to unlock it ;)
Is there any way to beat her without cheating?
You have to focus on your technique, look at Sophia, and then take a sprint
Thanks! I have one more question lol. What did you use to make this game?
I guess that you are asking about the engine of the game - if so, the answer should be Ren'py.
Yup, the engine is Ren’py and all the modelling is done in Honey Select 2