As Maiku, Karen and Miina deal with their ever growing feelings for each other, more about their past is uncovered. Matagu is back and forever lingering on the bounds of utter distastefulness while his sister stirs up more confusion, making everyone's lives a tad more perplexed. As Miina and Karen's affections for Maiku blossom into love, they cling to their pact of keeping other girls at bay until they can discover which of them is the actual sister. But reality can be a sad affair when love is involved, and both girls secretly dread the truth.
Summer vacations, carnivals, ghost stories and a couple appearances by Mizuho and her mother all lead up to a poignant climax where at long last Maiku's sister is revealed. Will the truth change their lives, or will the family bond they have prevail?