Before they left Sakura's apartment and after ensuring that she was already fine on her own, it was Nakano Yuna's idea that she and Tanaka Ryo exchange contact information with the other pair. This would allow them to all communicate in this case without having to waste her resources, such as by paying for an investigator to examine a mere address, for instance.
"Plus, we are all friends, right?" Nakano Yuna added casually. "It's normal for friends to exchange numbers with one another."
Friends… It has been a long time since she heard of that word. It has been so long since she hasn't experienced having friends by her side that she almost forgot what it feels like to have one.
Plus, for the first time since she broke up with her ex-boyfriend, Sakura has added additional phone numbers registered on her phone except for her family members only. Seeing them in her contacts somehow makes her oddly happy.