To enjoy seafood cuisine, there's no choice but to dig a tunnel♪ A reclusive girl embarks on a carefree journey with her summoned bear companion in another world (?). In a port town she visited in search of ingredients, the bear girl Yuna defeats the sea monster Kraken. Having taken down the town's villains, she is eager to savor some seafood dishes. To make that happen, securing a transportation route is essential, so she decided to dig a tunnel connecting the port and the town. The adults around her are completely at her mercy due to Yuna's outrageous antics! This is the fifth installment of the highly acclaimed adventure story featuring Yuna, the girl in a bear costume! *The digital edition includes a special short story titled 'Fina's Millira Trip' as a bonus.