Mecha-ude

Hero was a high schooler living an ordinary life. One day, he meets a very strong and intelligent mechanical arm named Mecha-ude. After a strange turn of events, the Mecha-ude started living inside Hero's hoodie and the two's life full of trouble begins. As the boy and his Mecha-ude fights together and strengthen their bonds, the two also meets new friends who also fights along with each of their own unique Mecha-ude partners. Out of those, one of the heroine has two Mecha-ude which appears out of her skirt. An active girl with a totally opposite characteristics from hero himself, he gradually becomes attracted to her. But the two are confronted with other Mecha-ude users who are in search of the secret of Mecha-ude relentlessly.