Zip-per

Action Shounen Sports

Gen's high school baseball team is in trouble when they lose their pitcher to injury. Gen, who is the catcher, finds a prospective new pitcher, Leo, playing with some neighborhood kids. But while Leo is an amazing pitcher, he refuses to join the team! After his pro-baseball-player father's career was ruined by stories of throwing a game for money, Leo decided he would never play baseball. Will Gen be able to help Leo move past his father's shame and forge his own identity as a baseball player? Source: mangahelpers

Zip-Up Boy

Drama Yaoi

High-school student Kazuki begins a casual sexual relationship with an older man after meeting in a bar. He becomes addicted to the affection but is perplexed by the indifference of his partner. Meanwhile, Kazuki's mother has decided to remarry Akira, the nicest guy you could imagine... unfortunately his brother Reiji just happens to be Kazuki's cold-hearted playmate. (Source: DokiDoki) Included one-shot: Inu to Shounen (A Dog and a Boy)

Monster-ism

Supernatural

This is a "constitution" biased world── One day, people with special constitutions began emerging from within humanity. By this, we include people with vampire and werewolf traits. And with the flow of time, these gradually became the norm and people with special constitutions grew to take up ninety percent of the population. But as society became brimmed with these types of people, the bias towards them grew. Those with a particularly strong constitutions now live out their lives in academic cities provided by the government. When Kazuyoshi, someone with absolutely no special trait, in other words, someone with "Zero Constitution" steps foot in one of these cities, he comes upon a seemingly suspicious and special constitutioner... (Source: Official site)