I guess Shiro is trying that “all routes are canon” kind-of VN, like how Echo did. But I have a theory that the true route is being locked and can only be unlocked once you fulfill all the wishes in Sissel, Owen, and Philip route.
With the flower how they talk about the "forget me not" we can every well assume that one is Euca the player character and the flower say before the "forget me not" can be saved the others must be helped so yeah I'm sure that will possibly be an ending or the saving of Jinny either one makes sense for a conclusion.