People cannot gain anything without sacrificing something, you must present something of equal value in order to gain something. This is the principle of equivalent trade in alchemy.

• 超喜欢这个动漫，虽然弥漫着哀伤，探讨着牺牲和获得，很沉重，可是道理很深刻。以上的话语贯穿整部动漫。