CBC pulled off a thrilling second- half comeback to beat Crescent College at Thomond Park in this Munster Schools Senior Cup quarter-final clash.
With his team trailing 19-15 at half-time, full-back Billy Cain converted two penalties to see the Cork side to victory over a shell-shocked Crescent.
Christians were the better side in the opening quarter and were clinical in scoring two tries in their first two visits to the Crescent '22.
John Willis scored the first off a lineout maul and that was followed up by a sensational team try finished off by Aaron Leahy.
However, Crescent powered back into the game with three tries before the break.
Ben Carew and then Maccon Casserly crossed for tries that saw the sides level.
The Limerick school then hit the front late in the first half when Jack Madden powered over the line, with Jack Delaney adding two first-half conversions.
However, Christians were not to be denied and Cain kept his composure to slot two second-half kicks to see them home.
CBC will now meet Ardscoil Rís in the semi-finals, while PBC will face Bandon or Glenstal, with both games due to be played on March 4.
CBC - B Cain; P O'Hara (K Waterman 36), K Coughlan, H O'Riordan, A Leahy; C Whooley, M O'Connor (K Murphy 50) (J Murphy 82); C Rasmussen (P O'Brien 60), (R Kelleher 75), S Buckley (S Rall 60), M Donnelly, A O'Brien, J Willis, R O'Sullivan, C Walsh (A O'Brien 60), C Hurley.
Crescent - T Duggan; C Quilligan, J Hoffman, J Delaney, B Carew (C Tuohy 45); M Casserly (D Casserly 62), D Ahearne (J Connolly, 36); D O'Shea (B O'Sullivan 65), C Dineen (J Skehan Fitzgerald 78), R Gallery (E O'Sullivan 78), C McDonagh (D Doyle 56), S Malone (C Gorey 57), J McKeogh (A Herbert 53), B Scott, J Madden.
Ref - T O'Donoghue (MAR)