水樹 晃一
from The Titan's Bride
He has left the basketball club to focus on his tests to get into college, feeling that he was being a burden to his uncle. Despite being summoned to another world, he says it is impossible to believe the fantastical story Caius is telling him, and more impossible for him to become his wife. Startled at first with the situation, he feels Caius has been really nice to him but marriage should be between two people who truly love one another, aware that Medina still loves Caius and bearing that in mind for his decision.

The Titan's Bride
Kouichi Mizuki has just graduated high school and is looking forward to the future, but after his last day at school, he finds himself summoned to Eustil, a world of titans! His summoner, Prince Caius, has brought him to the kingdom of Tildant to become his bride and fulfill a prophecy, but their considerable size difference makes Kouichi worry that he might not survive being penetrated by his huge new "husband". Caius agrees to send Kouichi home after a month if he is truly unhappy; yet as time goes by, Kouichi finds himself getting used to being a "dwarf" in a land of giants. And in spite of his protests, Caius's nightly ministrations on his body fill him with unimaginable pleasure...