Shin Yaranai ka

Gay high school student Masaki Michishita is making a desperate rush to the bathroom, not remembering that the park he has wandered into is a popular spot for men to meet each other for hookups. When he encounters the handsome Takakazu Abe, who immediately propositions him, Masaki forgets all about why he entered the park in the first place and seizes this opportunity for romance. However, nature's calling cannot be ignored; after Abe offers a unique solution to Masaki's problem, their bizarre, romantic, and sometimes even dangerous relationship begins. [Written by MAL Rewrite]

The anime was crowdfunded, aiming for 8 million yen (about $60,000 USD). It expands upon the one-shot manga and incorporate elements from Yamakawa's other works, as well as its own unique story elements. (Source: ANN)