This is about Hiro Aida and his friends. Their daily life at school and first romantic encounters with all the fun and confusion. All these people are connected to each other through cell phone messages. The anime has 5 regular episodes and 1 Epilogue episode.
GoGoAnime is the best site to watch Keitai Shoujo SUB online, or you can even watch Keitai Shoujo DUB in HD quality. You can also find Studio Hibari anime on GoGoAnime website.