Antoine Semenyo's beaming smile at full-time was as bright as the stadium floodlights after playing a major part in his side's rampant and ruthless success.
Star striker Erling Haaland played only the first 45 minutes, missing Semenyo's goal contributions, but will be licking his lips at the service he may well receive from City's new recruit.
A delightful ball into the box from the left flank was finished off by Rico Lewis for their fifth goal, before he showed class and composure to make it 6-0.
"It's not a surprise for us because everyone has seen how good of a player he is in the Premier League," said Lewis.
"Everybody wanted him, there's a reason for that and he's shown that today. It feels like a seamless transition into the team.
"He's a really good person as well which is another positive."
Having scored 10 Premier League goals this season for Bournemouth, Semenyo's first for City saw him run on to Rayan Cherki's pass and slipping a finish under Exeter goalkeeper Joe Whitworth.
In turn, he became the first player to both score and assist a goal on his City debut since Sergio Aguero against Swansea in August 2011.
You can read more analysis from Semenyo’s Man City debut here
