This is the Sword Art Online Limited Edition Light novel: Sugary Days. These chapters are commonly known as, Chapters 16.6, 16.7, 16.8, and 16.9. This covers on what happens during their honeymoon.

This happened during the 2 years when Eugeo and Kirito were still studying in the Sword Mastery Academy. Kirito and Eugeo were rooming together when a mysterious incident that involved both of them happened.... Mature content in Chapter 5

[COMPLETE BUT CURRENTLY EDITING] After asking for a weeks leave from there quest, Eugeo starts to feel a weird emotion towards Kirito. Could this be the end? Or a new beginning? -- POSSIBLE SPOILERS COULD BE IN THIS BOOK. I DO NOT OWN ANY OF THESE CHARACTERS, PLEASE SUPPORT THE OFFICIAL RELEASE.

Kirito has a crush on Eugeo, while Eugeo has a girlfriend, Tiese Shtolienen. Over time Kirito had to deal with these feelings for Eugeo until he has had enough. Eugeo, on the other hand, is confused, but soon finds out the truth of his beloved friend after he rescues him from Nitori Aiichiro's teammates. After some time, Eugeo gets into an accident which causes his death, reborn, Eugeo tries to find Kirito. Will the two be reunited? Only one way to find out, please read till the end, please...

[COMPLETE BUT CURRENTLY EDITING] Kirito meets a new boy that has joined his school, he goes by the name Eugeo. Do they become friends? And what is wrong with Eugeo? - CHARACTERS ARE NOT MINE, PLEASE SUPPORT THE OFFICIAL RELEASE. Trigger warning!! - #1 IN EUGEOXKIRITO #1 IN YUJIKIRI