This is the rare stuff I'm desperately looking for, but can not find enough.
Even so, I guess I will play this through until the end, because I like April.
I understand, that it would be too much work to write a unique route for each of the heroines, but...
If it is already decided, that the player has the option to go on a pure April route, then...
Maybe you could add just a little bit of extra, small brief branches to the April route/main story to somehow reward the player if he chooses to not get into a relationship with anyone else then April. ?
I can also think of
Once in a Lifetime,
Eternum,
Tales from the Unending Void and maybe also
Adventurer Trainer.