Male student Sota Tsukishima begins working at his family's public bathhouse as a back washer. While concealing her true identity, Sota's classmate Aoi Yuzuki visits the bathhouse. A relationship between the two begins to develop when Sota washes Aoi's back.

Volume 1: Asoko Araiya-san!: Ore to Aitsu ga Onnayu de!? (アソコ洗い屋さん！〜俺とアイツが女湯で!?〜)
Volume 2: Asoko Araiya-san!: Shower-shitsu de Nureru Honnou (アソコ洗い屋さん！〜シャワー室で濡れる本能〜)
Volume 3: Asoko Araiya-san!: Sukidarake no Naka ni Sosoide (アソコ洗い屋さん！〜好きだらけのナカに注いで〜)
Volume 4: Asoko Araiya-san!: Hekigan Girl to Ikasekko (アソコ洗い屋さん！～碧眼ガールとイカせっこ～)
Volume 5: Asoko Araiya-san!: Biyaku de Mezameru Kyuuai Shoudou (アソコ洗い屋さん！～媚薬で目覚める求愛衝動～)
Volume 6: Asoko Araiya-san!: Danjo ga Sakaru Rankou Onsen (アソコ洗い屋さん！～男女がサカる乱交温泉～)
Volume 7: Asoko Araiya-san!: Haitoku Mamire no Bath Time (アソコ洗い屋さん！～背徳まみれのバスタイム～)

Notes:
- Originally serialized as a web manga under the title Asoko Araiya no Oshigoto: Kataomoi Chuu no Aitsu to Onnayu de (アソコ洗い屋のお仕事〜片想い中のアイツと女湯で〜).
- Simultaneously released in long-strip format for mobile reading with each chapter split into 3-4 ‘episodes’.