Released in December 1, 2008. This game is very similar to the first Season 365 no Omoi and concludes the previous two titles and is staged at a place similar to the last two entries. The protagonist is a third year kendo student who is energetic and reckless. He has to decide who he wants to spend his Christmas party with this year. The title parodies a popular Japanese phrase and TBS drama, One Hot Summer. The girls are Athena Asamiya, Mai Shiranui, Hibiki Takane, Hotaru Futaba, Rose Bernstein, Reina Takida, and Nintendo DS-only Athena Hatsushiro.
The protagonist is a third year kendo student who is energetic and reckless. He has to decide who he wants to spend his Christmas party with this year.
