Rise of the Weakest Summoner

After rescuing the party of young adventurers inside a dungeon and spending some time together, Asterios and Miria head out to hold a summoning ritual that could possibly allow them to find a fitting member for their small party. But, nothing is as simple as it usually seems.
During their journeys, the duo of adventurers, or perhaps trio if the summoning succeeds, will have to work together through a few small obstacles on their path, some directly connected to Ast's family. Will they challenge the dungeon again? What will be their next destination? Will they learn more about Ast's unusual power?
One thing is certain, their bonds will surely grow stronger.