Houkago no Dungeon Diver: Nihon to Isekai wo Ikiki Dekiru You ni Natta Boku wa Level Up ni Isoshimimasu

High school student Kudo Akira discovers the extraordinary ability to travel freely between modern Japan and the fantastical realm of Do-Melta. Unlike typical isekai protagonists burdened by world-saving prophecies or urgent missions, Akira approaches his dual existence with a relaxed mindset, treating interdimensional travel as a refreshing escape from daily life. He dedicates his after-school hours to leisurely exploring the colossal dungeon at the heart of this new world, savoring the adventure and personal growth that come with each descent without the pressure of impending doom or mandatory destiny. This carefree dungeon-diving lifestyle introduces Akira to a colorful cast of characters who complicate his peaceful routine in unexpected ways. A guild receptionist frequently attempts to take advantage of his generosity, while his magic instructor offers questionable incentives disguised as training rewards. His explorations also lead to chance encounters, including rescuing a young woman who may offer companionship beyond mere gratitude. Through these interactions, Akira navigates the social dynamics of Do-Melta while steadily leveling up his abilities, balancing the thrill of discovery with the amusing complications of building relationships in a world where he has all the time in the world to enjoy himself.