Kitagawa Nagi, a freshman at an art school, is in love with his senior, Yamasaki Yuu, who happens to be both his neighbor and in the same folk song club as him. Since Yuu had good looks and was bound to be popular, naive country boy Nagi resigned himself to the fact that his love would always be unrequited. During their club’s welcoming party, Nagi was tasked to send his senior back to his apartment since he lived right next door to him. As Nagi tucks him in his bed, Yuu grabs hold of him and passes out with Nagi trapped in his embrace. Once morning comes, Nagi sneaks out, careful not to wake Yuu up and keeps that night a secret…
「隣人と添い寝からはじまる…NO YOU NO LIFE」美大に通う北川凪は、フォークソング部の先輩で同じアパートの隣人・山崎夕に恋をしている。端正な顔立ちで、柔和な性格の夕は女子にモテる人気者で、田舎出身の無垢な凪にとってそれは不毛に思える恋だった。そんな折、酒に潰れた夕を隣に住むよしみで家まで送り届けた日「おやすみ」と抱きしめられ、ふたりベッドで寝てしまう。凪はそれ以降、介抱後はベッドに潜り込み、朝になる前には家に帰る…という秘め事を続けている。夕に気付かれることもないまま先輩後輩としての仲が縮まり、好物のラーメンを奢ってもらったりバイクの後ろに乗せてもらったりと、凪は一層「好き」を強めていき――。