Firefighter! Daigo of Fire Company M Bk 17

Captain Gomi is trapped underneath Sengoku Coast International Airport and the only way to save him is through a circulation pipe that is filled with high levels of volatile methane gas! Disobeying direct orders, Daigo enters the pipe alone, but time is running short and the stakes have never been higher. Does Daigo have enough oxygen in his tank to make it to Captain Gomi and prevent the entire airport from going up in flames?