Marine Time & Error Code

 is the sixth chapter of the Trinity Seven series, released on May 9, 2011 in Monthly Dragon Age June 2011 issue and  later compiled in the second volume on November 5, 2011.

Summary
During a summer day at a beach, Arata ponders of his current situtation as he cooks food orders at a beach house. Lilith explains to him that this was the result of his and Arin's actions that caused the destruction of the Academy, as well as banning any future dangerous experiments. Although, after complying, Arata questions the reason for their current location. Lilith explains further that the Headmaster had originally planned the trip and decided the academy's destruction as an opportunity to execute the excursion while he repairs the school. Suddenly, they are visited by Levi and Selina who flaunts their swimsuits, especially Lilith's much to her embarrassment. As they continue to tease her, Arata mentions his recently aquired magical abilities, piquing Selina's interest in his new technique as a reporter. However, the group is forced to leave after Levi's teasing causes Lilith to reach her patience.

After leaving Lilith to mope at the beach house, Arata and Selina escape to the beach where Arata, after much prompting from Selina, transforms into his Magus Mode. Impressed with his magical power, Selina then binds him with her Logos Art magic as an experiment. Nevertheless, Arata easily destroys the binding magic, although he inadverdantly strips Selina, much to her embarrassment. Acknowledging his current state, Arata apologizes to Selina and gives her his jacket before heading back towards the beach house.

Meanwhile, Akio and Mira watch Arata as he returns to the beach house from the ocean. Akio questions her boss if that was alright. They both comment that his magic is quite impure.

Upon returning to the beach house, Arata and Selina are surprised the restaurant busy and full of customers. Arin explains that Lilith's yakisoba has become popular. Levi, meanwhile, is helping with waitressing. Arata then decides to return to cooking while Arin asks Selina if she had fun. Although still feeling a bit awkward from the previous event, Selina comments that she was shown the difference in their level, but nontheless continues to find him fascinating.

Characters

 * Arata Kasuga
 * Lilith Asami
 * Arin Kannazuki
 * Levi Kazama
 * Selina Sherlock
 * Sora in Grimoire form
 * Mira Yamana
 * Akio Fudo

Trivia

 * Selina is stripped for the first time by Arata's negation magic despite being only in her swimsuit. The reason her attire was affected was because she had most likely constructed her swimsuit using her magic.
 * Lilith chatises both Arata and Arin for their role in the destruction of the Royal Biblia Academy. This refers to the Arata's Breakdown Phenomenon caused by Arin in Grimoire Security & Abort.