The entire show unfolds through cell phone screens, text messages bleeding into real life so fast you barely catch the confession before it's already over. Every episode is a different angle on the same moment: someone falls hard, the phone buzzes, and suddenly they're already gone. It captures what romance actually felt like in 2007, when love moved at the speed of a text message, no buildup allowed.
Hiro Aida is a 17-year-old second-year student at an all-boys' high school, and every time he has fallen for someone, the feeling has gone unanswered. Unable to chase romance with his whole heart, he finds little to be happy about until he meets Rin, the Keitai Girl, and experiences real love for the first time. Around him, Hiro and his friends go through school life and their first brushes with romance, with all the fun and confusion that brings, linked to one another through cell phone messages. The ONA mixes comedy, drama and romance across five short regular episodes plus an epilogue.