A spoiler-free guide for all important missable content in CROSS†CHANNEL:

- In the opening chapter, choose ボケる for a missable scene.
- After the OP, complete both Misato's and Touko's routes before visiting the 祠 for the smoothest experience.
- In Youko's route, choose ぶつける for a missable scene.

Other than that, just explore at your own leisure. Kiri's route in particular has some fun optional scenes for those inclined. Have fun!