DBDR-002: Ayaka Muto imbub kuumaveeallika võõrastemajja, kus tsiviilinsenerid viibivad pikka aega Yamanashi prefektuuri mägedes! Kas on tore rahuldada tsiviilehitustöötajaid, kes on nii energilised, et nende erektsioon ei vaibu, visates neid oma uhkete tehnikatega?

Ayaka Muto infiltrates a hot spring inn where civil engineering workers are staying for a long time in the mountains of Yamanashi Prefecture! Is it great to satisfy civil engineering workers who are so energetic that their erections do not subside by tossing them with their proud techniques?