In the work, the four blood types A, B, O, and AB are given their own characteristics and cute anime images. The story mainly describes the daily lives of the four blood types. Such as the personalities, strengths, weaknesses, love, lifestyles, etc. of the various blood types, which are very accurate~...In the work, the four blood types A, B, O, and AB are given their own characteristics and cute anime images. The story mainly describes the daily lives of the four blood types. Such as the personalities, strengths, weaknesses, love, lifestyles, etc. of the various blood types, which are very accurate~