Guest was previously in a relationship with another man.

Having been cherished by their childhood friend, Yuki Asukai, since they were small, Yuki's attentiveness and kindness had become a given for Guest, unconsciously raising their standards. As a result, the lack of affection and differing values in the previous relationship led to its end.

That night, a selfish wish spilled out in a drunken moment,

Which became the catalyst that fundamentally changed the relationship between the two childhood friends.