Sword Art Online Light Novel Volume 11

Chapter 5 (Seal of the Right Eye, 5th Month of Human World Calendar 380)
Starting off where the previous chapter finished, Eugeo recalls the events that led to the current time, including his and Kirito's surprise to receive female valets. After Ronie and Teiza leave the room with the bag of honey-pies given to them by Kirito, Kirito asks Eugeo if he'd like to practice. Eugeo informs him that they'll soon have tests, and they Kirito should study for that. Admitting to this, Kirito decides to cram his studies, and asks Eugeo to retrieve him some food from the cafeteria later. Eugeo decides to go to the Training Hall, but found that two students had also occupied it, Humbert, and Rainos, who had in the past harassed Kirito and Eugeo for being commoners.

Eugeo decides to ignore them, despite their attempts to annoy him. He decides to strike a practice log, while considering words of Kirito, regarding the strength of one's sword. He claimed that the style that Rainos and Wanbell use draw power half from their own strength, and half from their bottomless pride. After finishing his practice, Wanbell mocks Eugeo's lack of a form, and offers to teach him proper form. Rather, Eugeo accepts his lesson in the form of a practice match. After a struggle to overpower one another, Eugeo barely manages to disarm Wanbell, before Rainos calls the match a draw. Eugeo contemplates the strength he saw behind Wanbell's sword, and wondered what he could use to "put into his sword."

Days later, Kirito and Eugeo take their valets to the forest, while eating lunch they ask for their help, they explain that Humbert has been requesting strange things from his valet, who's Ronie and Teiza's friend, to the point of making her cry all night long. Eugeo decides to take action since he felt that it was his fault for fighting Humbert, and with Kirito, they visit Humbert and Raios' room to talk to them, they play dumb and act as if they haven't done anything bad. The next day Teiza enters Eugeo's room after she finished the cleaning and tells him about her dad's intention in allowing her to enter the Swordmanship Academy to rise her family status and asks Eugeo to marry her if he doesn't win the Four Empires Tournament and Eugeo agrees.

The next day, while Kirito and Eugeo are in their rooms, they notice that Teize and Ronie have yet to arrive at their rooms, as they normally do. Kirito decides to hurry to the trainee dorms, by rushing out the window, and has Eugeo wait in the room, in case they return. After waiting for some time, Frenica, Humbert's valet whom he had humiliated before, came to Eugeo's room. She thanked and apologized to him. She told him that Teize and Ronie had headed to Humbert's and Raios' room, earlier that day. Eugeo asked Frenica to stay there, in case Kirito returned, and hurried to Humber's and Raios' room. He realized he'd taken his sword, but decided there was no time to go back and leave it.

Upon ariving, he was greeted by Raios and Humbert who seemed drunk. It's not long before they reveal to him Teize and Ronie, tied and bond in their bed. As it turned out, they knew Frenica was friends with Teize and Ronie, so they expected Frenica to cry to her friends, and them in turn, tell Kirito and Eugeo about her ordeal. As they expected, after Kirito and Eugeo's confrontation with Humbert had no effect, Teize and Ronie went to confront them and loose their composture. This was what they wanted, so that they could use their rights as upper Nobles to punish the lower nobles, they wanted to apply punishment through raping them. They waited for Eugeo to arrive, so that he could watch in horror.

As they began to violate, Eugeo came into conflict with himself, and every time he wanted to stop what was happening, his right eye began to hurt. He eventually moved, and swung his sword at the two. Raios was fast enough to move out of the way, but Humbert's left arm was severed. As a result, Eugeo's right eye was blown away, and all he could see through that eye was a red "Error" message (Which was in english, so he couldn't understand it). Raios was amused that Eugeo broke a Taboo, and managed to calm Humbert, who was panicing without his arm. He told him to use two of the ropes that held Teize and Ronie down, to tie up his wound.

Eugeo was in shock, having collapsed after swinging his sword, and losing his eye. Raios grabbed his sword, and told Eugeo, that as a criminal, he is to be killed by him. Before he could strike, Kirito came in and stops the blow. Raios told Kirito that Eugeo is a criminal, and cut off Humbert's arm, and Kirito exclaimed that he didn't care about the rules or Taboo. The two fight, and the result is both of Raios' arms being cut off, while holding his sword. Raios panics, as his life drains away, and dies before Kirito manages to save him. Humbert in fear and panic, runs out the room, calling the duo murderers and monsters.

The two untie the girls, and comfort them.

Adaption Notes

 * In the web-novel, the rape occured before Eugeo arrived. The Light Novel has it so that the assault doesn't begin until Eugeo arrives. It's likely Reki changed these events as a matter of censorship.