Spin-off of Sweet Heart Trigger! Brad, who has become an insomniac due to stress, meets Noah, a furry runaway who loves anthropomorphized animals. On a whim, Brad decides to live with Noah, and in order to break away from his past of being too devoted in love, he decides to be "selfish in love" by toying with Noah. However, the way Noah lives at his own pace, which causes problems for him, makes Brad's devoted heart ache, and his plan hits a snag. Furthermore, one day Brad is attacked by a mysterious man named Caleb who has an abnormal obsession with Noah!?