Keiken wo Sukiru ni suru Bannou na Nouryoku wo Te ni Irete, Saikyou no Tansaku-sha ni Narimashita ~JK to Issho ni Dungeon Tansaku de Nariagaru~

After the sudden loss of his parents, Masato Jingu—the eldest son of the Jingu family—takes on the heavy responsibility of providing for his younger brothers. To secure their future, he begins working as an explorer in the perilous depths of the Tokyo Dungeon. However, navigating its treacherous floors alone quickly proves unsustainable. Recognizing the harsh limits of a solo expedition, Masato realizes that conquering the dungeon and ensuring his family's survival will require reliable companions by his side. His search for allies takes an unexpected turn when his younger brother, Rekka, introduces him to Rika Tachibana, a high school girl who becomes his new exploration partner. Together, they form a party and descend into the dungeon, immediately facing a relentless series of trials and hardships. Yet, through every dangerous encounter, they learn to support one another, turning adversity into strength. As they overcome these daunting challenges side by side, the bond between them steadily deepens, hinting at a connection that may soon transcend mere partnership.