Nino, a socially awkward girl who carries a cockatiel, is tasked with watching over her mischievous neighbor Kira-kun for a year. As Kira-kun, holding a dark secret, grapples with opening up, will he discover new insights from Nino, or will his world engulf her? Explore the poignant story of intertwined destinies evolving into a love deemed 'closest to Heaven.'