Graineliers Vol. 2 (manga)

Luca and Abel have been rounded up to work on the construction of a government research facility, but it's actually a trap to identify carriers! The National Grainelier Special Education and Research Institute chair, Nicolas, has laced the water with an herbicide that's harmless to humans but disastrous to seed carriers. With suspicion hanging heavy over the young men, will Luca's secret be discovered?