Komazu is a sparrow, and as a sparrow, there’s one thing he knows about snakes: they eat small birds. When he encounters Shiratō, the white snake, of course he expects the worst — but instead of trying to eat him, Shiratō saves him from a boar stampede and flees, teary-eyed, when Komazu lashes out in fear. When the sparrow realizes he's perhaps misjudged snakes and decides to learn more about Shiratō, the two grow closer, first as friends and then as something more.

They are predator and natural prey, coming from different species and social castes; can love overcome the laws of nature, despite the differences in their way?
攻に必須の×××がない――!?雀×蛇「２本あるなら、１本ちょうだいよ！」雀のコマヅはある日森で、白蛇と遭遇！食べられる、と思いきや、白蛇・白什（しらとお）は彼をピンチから救ってくれた。徐々に歩み寄っていく二人、しかし、偶然にもコマヅは見てしまう。白什の股の間に、雀族にはないそれが、２本も生えているのを!!!興味津々で、白什の股間をまさぐるコマヅ。ところが共に過ごすうち、白什と交尾したいという感情が芽生え、それは、種族の違いを突きつけられる結果に……。