Limavady GS joined Strabane Academy and Lisneal College in the last eight of the Schools Cup with a five-wicket win over Regent House.
Jackson Dines top-scored with 28 as Friends were bowled out for just 72 - four wickets for Ross Bond and three for Alice McLaughlin.
Dines (2-5) kept things tight, but the Newtownards school conceded too many extras and dropped four chances as Limavady clinched the win in the 19th over - David Quinlin making 21.
Jonathan Orr top-scored with 30 and took two wickets as Strabane Academy edged out Grosvenor GS by 12 runs at Burndennett - three wickets for Cody Mehaffey.
Charlie Simpson made 60 and Lewis Campbell took three wickets as Lisneal chased Sullivan's 108 to win by five wickets.
Finn Lutton followed up his two wickets with 45 not out to lead Ballyclare HS to a 5 wickets win over BRA.
Harry Dyer took five wickets and scored an unbeaten 30 as Campbell romped into the quarter-finals - two wickets for younger brother Ollie, and 26 not out for Seb Yeates as well.
A Carville's 43 not out helped Down High to a 7 wickets win over Royal School Armagh, while half centuries for Craigan and West ensured a comfortable win for RBAI against Methody.
Closest game of the round saw almost 500 runs being scored with Wallace HS emerging victorious over Bangor GS by just one run.
ROUND TWO SCORES
Regent House 72 (19.3 overs; J Dines 28, D Johnston 17; R Bond 4-12, A McLaughlin 3-17, A Howe 2-2)
Limavady GS 73/5 (18.4 overs; D Quinlin 21, R Bond 18; J Dines 2-5)
Limavady GS won by 5 wickets
Strabane Academy 105 (J Orr 30, D Parker 2-13, C Wilson 2-13, J Drennan 2-14)
Grosvenor GS 93 (C Mehaffey 3-14, J Orr 2-12, A Britton 2-16)
Strabane Academy won by 12 runs
Sullivan Upper School 108 (24.2 overs, H McKeown 25, N Shine 22, L Campbell 3-21, R Oxley 2-11)
Lisneal College 109-5 (15 overs, C Simpson 60, L McElwee 22, A Barrell 3-20)
Lisneal College beat Sullivan Upper School by 5 wickets
Belfast Royal Academy 88 (A Armstrong 36, F Lutton 2-20, J Smyth 3-10, C Donnelly 2-11, A Adair 2-6)
Ballyclare High School 92-7 (F Lutton 45*, J Murray 2-21, B Coburn 2-17)
Ballyclare High School beat Belfast Royal Academy by 3 wickets
RBAI 2nd XI 85 (J Nelson 29, H Dyer 5 -28, O Dyer 2-13)
Campbell College 86-0 (H Dyer 30*, S Yeates 26*)
Campbell College beat RBAI 2nd XI by 10 wickets
Royal School Armagh 66-8 (J Wright 3-10, A Carville 2-10, W McNeilly 2-13)
Down High 67-3 (A Carville 43*, M Wilson 2-12)
Down High beat Royal School Armagh by 7 wickets
RBAI 235-2 (G Craigan 81, J West 80, T Crothers 31no, A Leckey 29no)
Methodist College 81 (A Watt 4-13, C Soper 4-8)
RBAI beat Methodist College by 153 runs
Wallace High School 246 (W McMullan 50, M Spence 51, R McCollum 33, D Rayner 5-35)
Bangor Grammar School 245-6 (S McMillan 65, C McCormack 42, J McMillan 30, S Donnelly 20, R McCollum 2-30, A Magee 2-61)
Wallace High School beat Bangor Grammar School by 1 run