Koisuru DNA+ 

A limited edition special book collecting all the stories in the Koisuru series so far, including one extra: 1. Koisuru Shokubutsu (恋する植物) Sports stars, Hiyama and Mizuno, find themselves caught up in something bigger than they first imagined when they go out to find out whether or not their fathers are really gay. 2) Koisuru DNA (恋するDNA | Love DNA) Hiyama and Mizuno are back for more trouble! 3) Koisuru Baby Leaf (恋するベビーリーフ) 4) Koisuru DNA+ (恋するDNA＋| Love DNA+); kakioroshi extra Hiyama Papa and Mizuno Papa reminisce about a passionate meeting in their youth.