As a person who likes only the most abstract of pure math, neither do I 
(Still ended up plugging in every possible pair from bitwam's cover though XD)(except Eury and Myrrh, bc I don't know what their full names are :P)
Saku Nakamura + Emma-Lie Lawrence - 74%
Saku Nakamura + Alana Gonzales - 66%
Saku Nakamura + Dolores Rebecca Dalemoor - 1%
Saku Nakamura + Joe-Seth Janczarski - 61%
Alana Gonzales + Dolores Rebecca Dalemoor - 85%
Alana Gonzales + Joe-Seth Janczarski - 46%
Alana Gonzales + Emma-Lie Lawrence - 73%
Joe-Seth Janczarski + Emma-Lie Lawrence - 78%
Joe-Seth Janczarski + Dolores Rebecca Dalemoor - 22%
Emma-Lie Lawrence + Dolores Rebecca Dalemoor - 1%
... hmm, looks like I need to make it much harder to get the good ending in the "Dolly's Route" visual novel 