Kabeana Money Hole

Mitsuru is working in the sex industry at a 'Hole Wall Speciality Shop' to help pay his family's debt, but was accidentally discovered by an old classmate Keita.
Keita swears to help out his friend with the money problems, but when all is said and done, will he still be able to see Mitsuru only as a friend...?

(Source: Ichijinsha, translated)

Note: Includes an extra chapter.