Lilliel is a 2D fictionnal character both okumura and Lilysa love. Okumura condiers her as his "adoptive daughter", his "angel".

2.5 Dimensional Seduction
"I have no interest in real women! My wife, Lilliel, is a 2D girl!" But something unexpected appears in front of Okumura, the president of the Manga Research Club... A real Lilliel? An exciting cosplay love comedy begins!!