Maken-Ki!

Annoyed that his pratfalls are just too convenient, Haruko encourages Takeru to make his own lunches from now on. Azuki judges an arm wrestling match between security committee member Chacha Akaza and a male student. Furan and student council treasurer Yuka Amato assigns Takeru and security committee member Uruchi Minaya to investigate random acts of violence on school grounds, where the victims have no memory of what happened and who did them. Meanwhile, Haruko and student council secretary Kimi Satō negotiate annual budgets with the other school clubs. Haruko remembers little faults about Takeru, while Uruchi recalls looking up to Haruko. Takeru later comes across a female student named Kumi Amio, soon revealed as the attacker of the victims. Kumi uses her Maken, Nephila, a yo-yo that can emit a spider web. After Takeru gets caught in the spider web, Uruchi arrives to fight back against Kumi, only to get caught as well. Acting on instinct, Haruko comes to the rescue, nullifying the spider web with her Maken, Murakumo, a heavenly blade with destructive power. Defeating Kumi, Haruko proves once again that she is the strongest girl in the school. (Source: Wikipedia)