A Summer Without Dark is the 17th episode of the D.N.Angel anime.
In this episode, Daisuke's class goes on an excursion to a tropical island. Takeshi is oblivious to Mio's obvious feelings toward Daisuke. Both Risa and Riku are increasingly attracted to Daisuke and a nature hike will determine which twin will end up with our hero.
- When Risa is sitting by herself during the hike, her hair is red like Riku's.