Hoshi no Samidare

Synopsis

Yuuhi has a nightmare of his grandfather chaining and warning him to make neither enemies nor friends. As his magic is linked to his stamina, he takes up exercise and is awed by how much stronger Samidare is. At Samidare's home, Yuuhi gets in trouble when he sees Hisame in her panties. Yuuhi realizes being with Samidare is fun but has another flashback of chains. When he asks Samidare why she wants to destroy the world, she explains why. Yuuhi is attacked by another golem and Samidare saves him again. Yuuhi's aunt informs him his grandfather is in hospital. Attempting to hone his agility so he can escape the golems, Yuuhi tries to fly across a river, but falls in and catches a fever. He sees chains but recovers with Samidare holding his hand. Yuuhi reveals that as a child, his grandfather chained him in a shed to teach him a lesson after he made a friend. As such, he is still terrified of chains. Samidare insists he visit his grandfather and she will make sure chains do not frighten him anymore. Yuuhi decides he will go and grow stronger from the experience.

(Source: Wikipedia)