From Ikemen Manga:

Miyu is a restaurant's daughter in the countryside, always helping out the family business. One day a couple of city boys visit and she meets a blondie named Keito for the first time?! Watch what unfolds in this sweet love story! ♡

This love relationship is only through smartphone technology and how the characters fight to keep the relationship safe. Technology simply plays a supporting role in this relationship and our protagonists are two people who are shy in love.