Seishun Fragile

Shiki Yuuto is normal student living with his imouto-like maid Toune in a big Europe residence built by his ancestors from long time ago. However, he hides a big secret from everyone. He is actually descendant of branch family from a lineage of high class wizards which moved to Japan hundred years ago. Despite being a shabby wizard, he used to help people with magic while chasing the "Bad Wizard" as duty given to head of clan, but now he is just lazy around and doesn't care much about magic anym