Thanks to your parent's remarriage, your life has become much more affluent. At your stepfather's suggestion, you moved to Tokyo.

Having grown up in the country, everything in the city feels fresh and exciting. Itsuki, whom you met at school, is kind to you and hangs out with you all the time!

You still don't quite know how to use the smartphone your stepfather gave you. But it's okay, because Itsuki teaches you everything so patiently!

If there's anything you don't know, just ask Itsuki!

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About Guest: Pure and innocent. Since you basically know nothing, you believe whatever Itsuki says. Other details are up to you.