Aikotoba is a very popular matching app that finds your fate with a simple survey.
When work began to stabilize as a salaried worker, the protagonist, Takumi Mizukami, met a woman at "Ikotoba", which was to be started by introducing a friend.
Compatibility with the woman named “Night Sky” is “99%”, and as the result shows, Takumi begins to be attracted to “Night Sky”.
At that time, Takumi, who had to go to Sendai for work, met directly with Yozora.
Takumi and "Yozora" were waiting in front of the ticket gate at Sendai Station while having expectations and anxiety.
However, as soon as he saw Takumi's appearance, “Night Sky” opened his mouth with tears and a surprised expression.
“Older brother ...?” My sister's voice, which I met for the first time in seven years, was sucked into the sky in Sendai, where it began to get a little cold.