The Anime Lad
Hakaze Kusaribe, princess of a sorcerous family, has been banished to a deserted island by a rival within her clan. Her message reaches Mahiro Fuwa, who wants the person responsible for his sister's murder. Hakaze offers magical help if Mahiro aids her in return. His friend Yoshino is pulled close to the arrangement. Calm judgment is now understaffed.
Super Eyepatch Fox
A sorceress is trapped on an island while a member of her own clan pursues a destructive plan. Mahiro is hunting answers about his sister's murder. Her message connects the two problems, and each has leverage the other needs. Yoshino, Mahiro's closest friend, is drawn into a conflict powered by magic and revenge.
Gigguku
Hakaze sends a plea from a deserted island and it reaches exactly the wrong boy for a quiet solution. Mahiro is furious, grieving, and determined to find his sister's killer. She has magic. He can act where she cannot. That bargain gives the fantasy conflict a raw personal charge, while Yoshino gets pulled beside a friend who has no interest in backing down.
Father's Basement
The opening announces tragedy and magical catastrophe with very little volume control. Its best decision is to make the alliance transactional. Hakaze needs help against her clan, while Mahiro wants magic directed at his sister's murder. Neither enters from a neutral position. Yoshino's proximity adds another human pressure point without requiring the supernatural threat to do all the work.