This is one of those shows you have to the manga first then watch the ova second. I watched the ova and i got lost so quickly. The whole thing is about an older brother falling in love with his sister. To others this was gross but to me it was sweet yet ironic. The story is well devolped but if you want to understand the plot more i reccommond you read the manga first. after i did this i found the story more intresting, because now i could fully understand why yori loved iku and the background behind it all. Also if you hate brother/sisterlove, you better not watch this.