Fics like The Older Brother of The Sword Saint

Natsuki Subaru is teleported to the capital of Lugunica a decade earlier. At 15 years old, confused but excited, Subaru finds himself in the Kingdom of Lugunica. Subaru meets 9-year-old Reinhard Van Astrea, who is troubled by his family's treatment. Subaru becomes like an older brother to Reinhard, taking care of him, playing with him, and teaching him things and stories that will eventually become a part of him. Having Subaru as a brother changes some things for Reinhard and the relationships within the Astrea Family. With Reinhard teaching him and time to train, Natsuki Subaru discovers his strengths and learns new skills over the years. (Some ideas come from "ThinkMind / Reinhard IF")

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