Ryuu to Ayumu Nariagari Boukensha-dou

Dion was the healer of an adventurer party, but his teammates betrayed him, tossing him off a cliff after they replaced him with Criola—a cute girl who could both heal and attack. They saw Dion as useless. Miraculously, he survived the fall and stumbled upon a dying dragon. After healing the beast, it transformed into a beautiful girl and saved his life in return, gifting him incredible power. Now, Dion embarks on an extraordinary journey with his dragon companion by his side.