Yuusha Party wo Tsuihou Sareta Ore Daga

Mihama Ariake was an adventurer who was fired from the hero's party for being weak despite playing a critical support role. But he was actually forced to be an adventurer and was happy to be kicked out. He then saves a cute dragon girl from an evil wizard and it turns out the saintess of the hero's party is in love with him. Ariake now proceeds to enjoy his perfect adventuring life with a party of cute girls.