Makoto is updating his database of "girls specifications" as his new "secret weapon" software will allow him to find the best match for himself. In fact the machine spits out the name of "Erika", the girl voted most popular attendee at the school festival. But Yumi tells him he`s absolutely not Erika`s type as the two girls have been friends since junior high.
Yumi`s specification is missing in Makoto`s database - he wouldn`t waste time to collect data about girls below "B rank". When Yumi detects hentai pictures on this hand-held the machine`s life span turns out to be surprisingly short. Now Yumi has to make up for the damage she caused, by arranging a date between Erika and Makoto.