Tittle:Shijou Saikyou no Deshi Kenichi
Genre:Action, Comedy, Martial Arts, Romance, School Life, Shounen, Slapstick
Summary: Shirahama Kenichi is an average student who has earned the nickname "Weak Legs" from always getting bullied. One day he meets a cute girl named Furinji Miu who helps him build the courage to begin training at a mysterious dojo where she lives. Here Kenichi faces intense training from masters of many different martial arts styles as he attempts to become stronger
My Recommendation to An anime series similiar to this:1.
Asu no Yoichi!2.
Kekkaishi