His Summer Harem: Part Eight: Rock Club (His Asian Summer Harem #8)
O. L. Tyme

Needing a lift, Homura ropes Tom into a late-night rock concert.
But first, he needs to look the part.
Once their shopping trip is complete, Homura dons her own rock n roll outfit, and they head to the sketchy part of town.
Once there, Tom finds himself exposed to a world he never knew existed, one of debauchery and freedom, as they find out what really makes them tick in the privacy of the crowd.