Mokke In The House! (もっけが家にやってきた！, Mokke ga ie ni yattekita!?) is the thirteenth chapter of the spin-off Houkago Shounen Hanako-kun.
Summary
At the Minamoto home, Tiara (Kou and Teru's 5 year old younger sister) introduces herself to the now-clean Mokke which previously caused the Mokke of the Dead incident, though it doesn't remember it. Tiara declares that the Mokke is her slave from now on, before bringing it to see Kou, who's cooking in the kitchen. Kou is happy to see Tiara, but glares at the Mokke for having caused the incident, and tells Tiara to keep a close eye on it. Tiara next brings the Mokke to Teru's bedroom, where he is taking an afternoon nap. However, Teru also glares at the Mokke on waking up, causing it to panic and run out of the house while Tiara hugs Teru. However, the Mokke quickly bumps into a giant insect-like monster, and is about to be attacked when a massive strike of electricity hits the monster from above. It's revealed to be from Tiara, who scolds the Mokke for going out on its own, after which they happily reunite and Tiara names it Minamoto Fairy.
It's noted that Tiara was named by the Minamoto father in the high anxiety surrounding the much-anticipated birth of a daughter. Though Tiara is young, she has great promise as her spiritual power exceeds even Teru's.