A visit to Hiromu's office leads to an awkward situation for shy househusband Masaki, but baby Hikari continues to be a soothing presence in their lives. At Christmas time, Hikari becomes fascinated with the star at the top of the tree.

Hikari latches onto the reluctant and gloomy neighbor boy, Yuki. Later, when Masaki falls ill and needs to isolate himself, Hiromu and company try their best to distract Hikari from "Ma-cha's" absence.

Hiromu's disapproving father Koji shows up at the house unannounced, when Hikari the hero swoops in to protect his parents! But when it becomes apparent that Koji's visits have another agenda, can Hikari the hero save his family again?

As the family prepares for their second child, Hikari gets excited for his new role as big brother, but Masaki is overcome with worry over his new child's future. Later, the family plays hide and seek at Hiromu's family home.

Hikari tries to be a good big brother to Hinata, but works a little too hard. Hiromu's parents try to make up for the years they've lost with their son and his family.

Masaki gathers his courage and brings his family and friends with him to his hometown, but things get awkward when he's confronted by his cousin Kazuhiko.