Tonari no obake-san manga

Tonari no Obake-san summary:

From Day of the River: Nanami received the opportunity to start her independent life once entering high school, and began to live on her own. However the next door neighbour, a young man named Niji, emits a mysterious aura inside and out. Little by little Nanami is attracted to Niji, until she discovers the big secret he's been hiding…