Because of the fact that Liya is still a virgin who has little to no experience in the affairs of making love, Venn decided to approach her as gently as possible, so as not to trigger any overreaction from her.
Unlike dealing with Rin that harshly, he needed to guide her as gently as possible.
However, he needed to incorporate exciting elements into making Liya have an orgasm three times successively within ten minutes, ordinary method won't suffice with the harsh conditions attached to the sudden mission.
After activating his skill, Pleasure Meter, Venn's irises immediately turned red within seconds and a virtual meter could be seen hovering above Liya's head.
The meter gauge was showing a figure of 30 which was on a completely normal level.
It was up to Venn's ability to increase the figure to 100.
In order for Venn to progress his domain faster, he could not afford to fail the sudden mission.