It's New Years eve, and Mitsuki goes to a small party at her friend Ruri's place, where she learns a valuable secret about Yuuto's situation. She tries to tell him, but her surpressed emotions start to well up.
Perhaps "Yuuto Suou" somehow 
became shortened to "Surtr."
Vielleicht wurde „Suou Yuuto“ irgendwie
auf „Surtr“ gekürzt.
Tal vez "Suoh Yuuto" se acortó a Surt.
Tal vez "Suoh Yuuto"
se acortara a Surt.
Magari "Suou Yuuto" è stato contratto
in qualche modo fino a diventare "Surtr".
Talvez "Suou Yuuto" tenha
sido abreviado para "Surtr".
Возможно, «Суо Юто» каким-то образом сократилось до «Сурт».