The OVA features six 'Slightly Ecchi episodes that can't be broadcast on TV'.

My Tsukumogami Master: It focuses on Kazuya's daily life with with Kiriha, from waking up to her naked in bed and taking a bath with her after school.

At the Public Bath: It focuses on the Kagami-family's trip to the public bath along with Chisato.

My Master: It focuses on Sunao and Kotetsu's time in the bath together.

Kokuyou's Repayment: It focuses on Kokuyou attempting to repay Kazuya for letting her into their household.

Last Fort: It focuses on the aftermath of Kazuya's battle with Sunao, with Kiriha and Kukuri taking care of the incapacitated Kazuya.

Erotic Deliberative Assembly: It focuses on Kazuya being interrogated by the girls after an erotic book is found in his possession.