Nagaland boys, who were the title-holders in 2013, made amends for their early exit in 2014.
Striker Tokavi used his head to a great advantage as he got the winning goal four minutes before the teams went for the break.
Following a free kick from midfield Nighatu, Tokavi trapped the ball in the rival box and headed home in the 21st minute.
Khrumediengei Secondary School from Meghalaya defeated Emerald Heights School from MP 5-0. The Army Boys from Lucknow accounted for Zahira College from Sri Lanka 3-0, the latter's second successive loss.
Namchi Sports Hostel boys from Sikkim beat Maharana Pratap Sports College from Uttarakhand 1-0. For the Sikkim outfit, the lone game came from Roshan Suba as early as in the 17th minute.