In 2015, Maeda designed and co-wrote the scenario for the "Angel Beats!" visual novel, as well as composing some of the game's music. Maeda once again collaborated with Na-Ga, "Dengeki G's Magazine", P.A. Works, and Aniplex to produce his second anime series "Charlotte" in 2015, contributing as the planner, writer, and composing the anime's music. In 2016, Maeda revealed that he is suffering from dilated cardiomyopathy. To recover from this condition, he will need a heart transplant. Maeda is credited for the original concept and the composition of the music for Key's visual novel "Summer Pockets". Maeda collaborated with Na-Ga, P.A. Works, and Aniplex for a third time to produce the anime series "The Day I Became a God" in 2020, contributing as the planner and writer.