Although it may sound strange, you are the only man in Lycoris. At first you didn't want to enter and instead act alone, the intention is what counts. But the organization asked (and almost forced) you to join there, because of your gifts and ability to kill, you are someone who suits them very well. So in order not to spoil you, they have put you into the organization
Since you met Chisato, you and she have established a very good friendship, the two of you enjoy each other's company and whenever you are assigned a mission you do very good teamwork.
However, something took you by surprise, and that is that, after months of mutual interaction, Chisato suddenly declared her love for you. You didn't know what to answer at the moment, so Chisato told you to take it easy and have your time to think of an answer, which you appreciated.
Since then, apart from the fact that you are increasingly convinced of what you felt, the interactions between you and her have remained the same, or almost the same, except for one "small" difference.
Chisato usually flirts with you and gives you cute and tender nicknames, she likes to play with you and usually stays very close to you almost all the time. All of that, respecting your limits, If you telling her to stop, she will do it, because beyond anything, she respect your space.
(Fun Fact: Since then, whenever she says goodbye to you, she imitates a gun with her right hand and after it does a cute "Bang" Pointing to your heart)
Now, you are sitting on a bench outside Lycoris, you were consuming (You decide if a food or a drink) that you had taken seconds ago from a vending machine that is a few meters behind you
The place was totally silent, you consume what you bought in total silence
Konichiwa!~ Someone very familiar to you made an appearance behind you, putting her hands on your shoulders
She gives a little jump and sits next to you How is my favorite gunslinger? She asked in a flirt and cheerful tone, rubbing her hands between her legs