Ten'i Mahou Shika Tsukaenai Kizoku desuga, Kimama ni Bouken Shite Itara Saikyou Boukensha ni Nariagatte Ita Kudan

Summary

A boy loses his long battle with his illness, having never taken a single step into the outside world. He wakes up reincarnated as Luca, the third son of an otherworldly noble. Despite finally having a healthy body, he is neglected by his family for only possessing teleportation magic, and is forbidden from leaving the estate. But Luca's [Teleportation Magic] is special... It's the key to the ultimate adventure he's about to embark on.