- Written by Yuya TakahashiDirected by Kyohei Yamaguchi
Emu, Asuna and Hiiro go back to the college that the Gekitotsu Bugster attacked last episode, theorizing that the person that contracted the Game Disease is there. They're soon proved right, as after a quarrel with her boyfriend, a girl named Youko falls over and shows symptoms of Bugster infection. Hiiro forcefully causes the Bugster to manifest, revealing that it's Collabros holding another one of the 5 stolen Gashats - the DoReMiFa Beat!However, before they can properly deal with him, Graphite and Snipe both show up. Barring Level 3 Ex-Aid, the emerald Bugster trounces around the Doctor Riders, but is soon assisted by Genm, allowing the villains to escape.
After the battle, an enraged Hiiro confronts Taiga about Graphite and their connection to five years ago, furiously proclaiming that he "could've saved Saki"! The tragic backstory that gave birth to the bitter rivalry between Brave and Snipe unfolds...
This Episode contains the following Tropes:
- Battle in the Rain: The fateful fight between Taiga and Graphite 5 years go took place during a rainstorm.
- Brutal Honesty: Hiiro decides to stress out the patient in order to preform the op, bluntly telling her that a monster will come out of her and kill everybody.
- Later, Hiiro get this then thrown right back at him by Taiga.
Taiga: That's right. Graphite's the one who did your girlfriend in. - Dancing Is Serious Business: The DoReMiFa Bugster only form of offense is to send Rhythm Game-notes at his opponents. If they succeeded in dancing to the song, nothing happens. But if you'll miss notes, just like Brave did, at the very end you'll blow up.
- History Repeats: The reason Youko doesn't want Seiichi, her boyfriend, to know about her illness is so that he won't be distracted away from his career as a violinist. Hiiro's girlfriend Saki did the exact same thing 5 years ago, which lead to her death.
- It's Personal: Hiiro against Graphite. Given that Graphite was the Bugster host for his girlfriend, it isn't surprising.
- After getting beaten by Level 3 Brave, Graphite states that he will make him pay for this humiliation.
- I Want My Beloved to Be Happy: The main motive of this episode and the driving force behind Youko and Saki's action towards their boyfriends.
- Pipe Pain: The Bugster Viruses summoned by Collabros take form of a street gang and come armed with pipes.
- The Reveal: Hiiro lost his girlfriend to the Bugster Virus. And she was Graphite's host.
- Taking the Bullet: Emu for Hiiro against Graphite's attack.
- Gashat Count: Ex-Aid: 2 Brave: 2 Snipe: 1 Lazer: 1 Genm: 2
