The very first thing that Hana did was to get naked and try to jump on Rein. But a bewilder Rein stopped her and asked her what in the world she was trying to do. So a bewildered Hana replied with a cute tilt of her head that they were going to have sex.
Rein did not get flustered and asked her for the reason. Rein already had an idea in his mind but he still asked Hana just to be sure. But Hana's reply was unexpected. She told Rein that obviously they were going to do it to get rid of their stress with this pleasure and to strengthen their bond.
Hearing this answer Rein immediately bonked Hana on the head. Then he told her that they were first going to meet up with his partners and only after that would they discuss about the future. So Rein asked Hana to quickly wear her clothes.