Kozuki Sayoko

About
An unfortunate girl who gets dragged along by Amatsugami Hidehiko after he blows up her place of work and she gets rigged with an explosive ring. She is a 2nd year HS student.

At the start of the game she is happily working for the immigrations and customs bureau with her junior, Sekimori. Shortly after that they got bombed and Sekimori seemingly dies protecting her. She sees Hidehiko as her savior, but after realizing he did it she immediately slaps him. For some reason this makes Hidehiko fall in love with her and take her on the spot. Afterwards she is rigged with the explosive ring.

The explosive ring is said to explode when she is more than 5km away from Hidehiko, when she tries to remove it, when Hidehiko decides to kill her or when Hidehiko dies. It forces her to cooperate with the man who immediately took her virginity when they met.

She tends to act as a straight man to Hidehiko (and others), being the (unheard) voice of reason. She has a hard time coming to grips with Hidehiko's odd behaviour.

She is part of the children's literature club.

It is revealed early on that she was the junior of Yabe Sumako who know works as the vice chairman, she looks up greatly to her.

During the game, she's placed in the room next to Hidehiko's. She does not like this as she'd rather not see him all the time.

As the plot progresses she has to come to terms with the fact that she is travelling with someone who is essentially a terrorist. She also encounters Cyborg Sekimori who is constantly confusing her relationship with him as positive when beaten. She manages to stay strong despite all this.

One turning point is when she is confronted with the chairman, Saionji Kimimaro. He can only be described as revoltingly disappointing and she is shocked that this is who she worked for. Another shocker is when Sumako ordered her to also be assasinated by Honoka as she assumed that she turned willingly.

At the end of the game she is kidnapped by Tsuchimikado Kugahiko who falls in love with her in very similar circumstances as Hidehiko. She dislikes being forced to marry him when being saved comes to realize her true feelings for Hidehiko. During this it is also revealed that the explosive ring was just a bluff.

After the game they seem to continue their relationship.

Abilities
She is shown to be a competent administrator when handling immigration and customs before Hidehiko blew it up. Apart from that she is a very capable straightman armed with her trusty Harisen. Her academic stats are 4, 3, 3, 3 (humanities, science, foreign lang, PE).

Her special ability has her snap under the circumstances, her attack goes up but she becomes more vulnerable.