Since I've Gotten Used to Being Alone, I'm Ignoring My Fiancé!Newおひとり様には慣れましたので。 婚約者放置中！ ; Ohitorisama ni wa Naremashita no de. Konyakusha Houchi-chuu! ; 已經習慣一個人了。訂婚對象放置中！ ; 已经习惯一个人了。订婚对象放置中！

Countess Nicole's fiancé, Chaos, is always by his childhood friend, Princess Caroline's side. As a result of being constantly neglected by Chaos, Nicole has awakened to the idea of ​​being alone, thinking, "If that's what he likes, then I should do what I like too!"...? While Nicole has discovered the ease of being alone, Chaos, on the other hand, doesn't seem to understand the seriousness of the situation...?