The scene where Bosco explains that he didn't want Makiko just for her blood.
The accompanying flashback shows he repeatedly exposed himself to garlic, crosses, and even high powered UV lamps to gradually build immunity to sunlight. Blood was the only thing he absolutely couldn't do without. So he did the next best thing by limiting himself to feeding only four times a year, while using supplement tablets inbetween.
The scene between Ayaka and Karino at the park, during Incident File 04: "Lover Come Back to Me".
The members of Phantom Quest find themselves out of business, thanks to the Hadja stealing all of their clients. So they end up part timing to make ends meet. When Karino finds out, he offers Ayaka a job at U Division, as his assistant. Ayaka's smile and the look that passes between them says it all.