Possible Clues:

• Perfectly matching
• Meeting extra-terrestrial in sport centre - who'd believe it!
• Corresponding to a hundred and twenty-one, by the sound of it
• Direct
• A way to correspond
• Come face-to-face with12-hour shift?
• Type of ratio
• Simple ratio
• Like an intimate conversation just before lunchtime?
• Like intimate combat in time immediately before start of lunch break?