SaiSa-challenge (Saitou x Sanosuke yaoi fan fiction)- Sizzle and Burn

"The challenge posed, in the spirit of summer and fun and heat and our fiery love for that hot hot hot pairing of 
Saitou Hajime and Sagara Sanosuke, was: 
write a fanfic where our two hotties deal with either
1. the scorching hot weather;
2. a cigarette-caused fire; or
3. the heated feelings of a spurned admirer (love triangle scenario).
...with a separate, special challenge added: Saitou and/or Sano cross-dressing."