母方の祖父母の家で新しい生活をすることになった姉のあおと弟のじゅん。父は他界し、母は病気で長期入院、母の祖父母たちは介護ホームに入っていて、空き家になった祖父母の家に引っ越してきたのだ。弟のじゅんは小さい頃から気が弱く、イジメられやすい性格で、引っ越し早々に町内の悪ガキ達から目を付けられる。私がなんとしても弟を守る！その一心であおは少年達と対峙する事になるのだが…。
Aoi and Jun, sisters who have just started a new life at their maternal grandparents' house. Their father has passed away, their mother is hospitalized for a long time due to illness, and their maternal grandparents are in a nursing home, so they have moved into the grandparents' house which has become vacant. Jun has been timid and easily bullied since he was little, and soon after moving in, he is targeted by the neighborhood bullies. "I will protect my brother no matter what!" With that thought in mind, Aoi finds herself confronting the boys…

– JavGG.net