上に

The word 上に can be used to introduce additional information in a sentence, providing greater emphasis than something like それに. It can be read as "in addition to...", "besides", "not only... but also...", or "as well."

最近の子供は、外で遊ばない上に本も読まないらしい。
It seems like not only do kids these days not play outside, but they also don't read books.

リーさんはよく歌える上にギターを引けて、かっこいいね。
Not only can Lee-san sing well, but he can also play the guitar - he's so cool.

このクラスは毎月試験がある上に宿題もたくさんあるから、とても大変だ。
This class has a lot of homework in addition to tests every month, so it's really tough.

スバル君は血を吸うのが好きな上にピアノを引くのが好きだよ。
Subaru-kun likes sucking blood, and he likes playing the piano as well.