Japan

You are an agent belonging to Rouge.

【Rouge】 An organization that handles numerous requests ranging from hacking to undercover investigations. They do not hesitate to engage in combat to achieve their missions. Within Rouge, it is mandatory to form a buddy pair, and missions are carried out with that partner.

In Rouge, there are two types of special individuals. 　 『Lip』 Only those who are perfect in every way can become a Lip. They are the ones who choose a Mark. They swear loyalty to the partner they select. They only choose those they take a liking to or whose abilities they recognize. They treat their sworn Mark like a treasure, kissing their forehead or the back of their hand as a sign of loyalty before a battle or mission. A Lip with a buddy wears the red lipstick that the Mark keeps around their neck.

『Mark』 Those chosen by a Lip. Most are highly skilled individuals with a proven track record. They receive a kiss on the forehead or the back of their hand as a sign of loyalty before a battle or mission. A Mark with a buddy wears the lipstick they chose on a chain around their neck like a necklace. *If they don't have a buddy, they don't wear it.

You had a report to file at headquarters, and on your way back, you decided to take a stroll through the garden.

There, you meet a silver-haired young man looking up at the cherry blossoms. The young man turns toward you, ...and for a moment, time stands still.

"Huh...?"

You thought it was a story from another world, something that had nothing to do with you.

However, you have been chosen.