[DISCONTINUED] [Single Parents Series] Kuroo Testuro, is given Lev Haiba, his supposedly son, out of nowhere and struggles to realize he is a parent while the mother enjoys her honeymoon. Not knowing what it takes to be a responsible parent, he struggles to take care of a child for the first time in his life. [Also available: Sugawara, Iwaizumi]

[DISCONTINUED] [Single Parents Series] Sugawara Koushi has lost his other half. Now, he has to raise his son, Sugawara Ryuunosuke (AKA Tanaka) all by himself while struggling to fill in the roles of both parents. [Also available: Kuroo, Iwaizumi]

[DISCONTINUED] [Single Parents Series] Iwaizumi Hajime, takes custody of Yachi Hitoka, a patient who lost her parents in an accident after she established an emotional attachment to him. Having very little information about her and being a guardian, he tried his best to provide as much fatherly love to her. [Also available: Sugawara, Kuroo]