[EDIT] Sadly this place seems to have gone. I don’t know if they have branches in other locations, but the Kondae one is no longer there. I walked down that street yesterday and a lot has changed.
Chocolate and cheese cake layer cake – and cheese cake from Baker City Coffee near Konkuk University (건대)
Both get a YES – but just cheese cake very much gets YES!
Address: 서울 광진구 자양4동 6-67 (Seoul Gwangjin-gu, Jayang 4dong 6-67) – that’s the address on their business card… however if you’re using google maps… it’s not in the right place.
Get off the subway at Konkuk University (건대입구역) and take exit 5 and turn left past Watsons – keep going until the first right turn and walk down that street – it is on your left. ^^