Happiness! De:Lucks

The story begins with Valentine's Day coming up in just a few days and there's a rush for all the girls to get the chocolate they want in order to give it to the boys they like, in accordance with Japanese custom.

Kamisaka Haruhi, a mage in training, is out with her friend Hiiragi Anri, also a mage in training, in order to do just this.

While walking outside in the park, after buying the chocolate she wanted to give to a boy she met when she was a child, Haruhi meets Yuuma, who stops some younger boys bullying a young girl, and Haruhi thinks that he may be the boy she's been searching for all this time.