ライトノベルのヒロイン４人が変化する話です 変化内容【平面化、球体化、風船化、物品化】等々 フルカラー　表紙含め１３P This is a story about four heroines of a light novel who change The contents of change [flatness, spherification, ballooning, materialization] etc. Full color, 13 pages including front cover