So Fuusuke went with his father Futaro overseas, but came back before flying off to Suzuka crying in the car?
There was 6 years time skip, but he continued to live with Suzuka as he attended to the school with Genki.
Suzuka was going to meet Ruri on her birthday, but something happened to Ruri on her way to the meeting place, it wasn't her fault but still is blaming herself for making her go and leaving Fuusuke... damn...
Looks like Fuutaro suddenly stop drinking blood after drinking from Suzuka, but his father was providing him with this.
Is he a real vampire or it's just some weird condition...