When Alec collapses with a fever, it falls on Shiori to nurse him back to health. But it's not just Shiori who is left worried—powerful friends from Alec's past appear, intrigued by the housekeeping mage the magic swordsman has grown so close to.
Alec then picks up a request posted by Shiori herself: taking her familiar Rurii on a trip back home. The trip marks a chance for the two to get to know each other better, but it might also mean surviving a literal ocean of slimy magical beasts in the wondrous winter environment of the Blue Forest...