Isekai Kara Elf-San Ga Ochite Kita No Desu Ga!? summary:

Akio, a compassionate and empathetic individual, comes to the aid of Mel, an enchanting elf who unexpectedly finds herself in another world while on her journey home. Initially, Mel sees Akio as her savior and offers to serve him, but instead, Akio decides to share his life with her for a while. This unexpected encounter profoundly alters Akio's life, which was previously fraught with challenges. And so begins an exciting romantic comedy as they embark on a thrilling journey of cohabitation with the beautiful elf!