Kenichi 
Isekai Tensei: Recruited to Another World Volume 4 [EPUB ebook] 

Tenma and his party are headed to the capital to participate in the martial arts tournament. On their way, Tenma manages to bail some young royals out of trouble and earn himself a favor from the crown. Once he arrives in the capital, the king invites him to live in the palace! Many faces new and old await Tenma in the big city, including Aura’s mysterious older sister… Why is Aura so deathly afraid of her, and what’s this about Tenma possibly getting a noble title?
After much mayhem and mishap, Tenma finally gets the moving(?!) reunion everyone’s been waiting for!