晚安，親愛的王子
| “ |
The "key" to ideal happiness |
” |
| ——Vending machine when purchasing the BromideR, Chapter 5 | ||
Goodnight, Sweet Prince is the 40th track of the DELTARUNE Chapter 5 OST. It plays while using the BromideR.
Beautiful Bathtime is a faster version of this track with different instrumentation.