About My Room Leads to Dungeon: After School Club Activities of Different World Adventure

Boku no Heya ga Dungeon no Kyuukeijo ni Natteshimatta Ken: Houkago no Isekai Bouken-bu
僕の部屋がダンジョンの休憩所になってしまった件 放課後の異世界冒険部

Main Story

novel

Suzuki Touru has just scored an amazingly cheap apartment–but the reason it’s so cheap is the front door opens up to a classic fantasy dungeon! Luckily, Touru has always wanted to explore a dungeon. But when he stumbles across Ria, a beautiful blonde knight, he may well have gotten more adventure than he bargained for! (Source: Seven Seas Entertainment)

Sequel

novel

*Note: Includes an epilogue.*

Adaptation

manga

After my parents disappeared, I, Tooru Suzuki, bounced around from place to place and ended up as a caretaker of a school dormitory in Tachikawa. The building is in disrepair, the student boarders are all weirdos, and of course, there are rumors about ghosts haunting it too. It turns out that believe it or not, the dorm is connected to another world! Although I don't have a single friend in class, I can always just go to the dungeon to slay monsters and level-up. There, I became friends with a slime, a female knight, and even a female sorcerer! Thus, I begins another day of after-school club activities in another world! (Source: Takeshobo, translated) *Note: Includes chapter 0.*