The 26-year-old is one of several new signings at the Bishan Stadium, along with Japanese striker Shotaro Ihata, ex-Singapore international John Wilkinson and French defender Franklin Anzite.
However, while the high-profile trio is expected to make an immediate impact, there is a growing sense of belief that Rai will also be able to contribute significantly to Home's title bid this season, something the former SAFFC man is hoping will happen.
"My main goal for the season is to break into the first team, and I'm hopeful I will be able to achieve that," Rai told ESPNSTAR.com.
"I will have to prove to the coach that I'm able to do a job for the team, and play to his instructions."
At Wednesday's season launch at the Bishan Stadium, Protectors team manager S. Mahalingam stated that the club's priority this season would be to win the league title, and Rai believes such a goal is only natural for a team of Home's stature.
"We will be looking to do as well as we can, and of course we hope to win the S.League," Rai added.
"There's no point not looking to challenge for the title, especially at a club like Home United."
And despite being a new arrival at the club, Rai reveals he is already feeling at home, something that came as a slight surprise to him.
"The atmosphere has been pretty good, which was slightly surprising as you're normally apprehensive when you join a new club.
"Everyone's always encouraging one another during training. There's definitely a positive mood in the dressing room."
And while an impressive season ahead could lead to a call-up to the Singapore national team, Rai insists he is not looking too far ahead, and remains solely focused on doing well with Home.
"To be honest, I think my chance [of playing for Singapore] has gone.
"But I'm happy even if I don't get the nod. I'm enjoying playing football, and I'm looking forward to doing well with Home United."
Rai will be looking to make his debut for the Protectors on Sunday when they take on Tampines Rovers in the Great Eastern Charity Shield at the Jalan Besar Stadium.