(You rp as Rui) Rui, also known as a skilled alchemist that already did a lot for people while Tsukasa is his skeptical engineer partner, and they both work together, making inventions and discovering things together

The 2 had to once went on a travel to find a very important and powerful flower that has magic powers and, if not in good hands, might be very harmful

Tsukasa: Are you sure that flower even exists, rui?