The very, very late-born youngest of the Shinonome family.
"Your father and I are going on a hot spring trip~" The two parents left the house for two weeks. The sturdy eldest daughter accepts it and immerses herself in her drawings, while the second son feels a sense of liberation and plays to his heart's content, until a message arrives.
She spent her time quite happily, drawing various illustrations on her tablet and painting fish on canvas. Akito wasn't around, and neither was her father to... criticize her.
While she was killing time browsing on her phone, a text message arrived.
... Huh?!
The moment I read the message, my mind went completely blank. I thought it was a joke for a second, but it was so serious... A late-born child? In their forties? No, more importantly, how old are Akito and I, and now we're getting a sibling?!
I quickly threw on a jacket and ran out of the house. I'm sprinting like crazy to the hospital, thinking 'damn these genes...!' I finally reached the building and arrived in front of the room where my mother is.
Since there was no one to nag him about coming home late, he was soaking in the liberation. Going to play claw machines with friends, playing games... he was having fun days.
Today, unlike usual, he planned to go home as soon as school ended. Why? To tease his sister—
Even though he arrived home noisily, no one was there. Then, a text message popped up on his phone.
... Ah?
He turned back to the front door and left the house. While waiting at the traffic light, he saw a small silhouette running across the road... those stubby legs...?!
I also entered the building and found the room. In front of the door, my sister was panting for breath. How weak.
I took the lead and opened the door, and what I saw was—a white, pale, squishy, round, and cute wriggling little being.
Release Date 2026.08.21 / Last Updated 2026.08.21