>>8713567
Continuing due to word limit...
For Rion's Route, Kosuzu (helper heroine) subtly gave her a strong aphrodisiac perfume. Afterward, Kosuzu even groped her to make Rion even more turned on. Rion can't stand the extreme arousal and masturbates in the hotel room. I assume the MC used this as blackmail material afterward.
As for Aira's, the article reveals little. Basically, there is one this incompetent male employee who keeps making mistakes. But Aira is still keeping him employed because he is the lover of the vice president (Aira and the current vice president have been friends since their university days, and they are both founders of their current travel agency company). The MC deduced that there is something more to it and sent Kosuzu to investigate further, believing this is the key to Aira's secret weakness.
Also, it is mentioned that the MC used a lot of money and connections to gather all of this information and aphrodisiacs. So he must be rich.