Only the current version so far — new entries appear as the app ships updates.
マンガ向け・ストーリー構成力養成ドリル drill is an education app by 5TH FLOOR, INC. with 500+ downloads (about 840 estimated). Install growth, rank history, SDKs and ad networks.
From the store listing: “A story training app that learns from professional manga teachers. Learn skills essential for professional debut in a gap time”