Sono Hanabira ni Kuchizuke o: Tenshi no Akogare is an adult visual novel and the thirteenth game in the Sono Hanabira ni Kuchizuke o series of games. As indicated by the new artist and writer, as well as blue coloring of the logo, it is the start of a new subseries, informally referred to as the "Angel" series, taking place outside of St. Michael's Academy for Girls. It features a new couple, Aihara Ringo and Takao Chiaki.