Seated in a quaint little coffee house in the heart of south Delhi, Prachi Singh and Somak Biswas could, in some ways, pass for just another dating, doting couple, one of many that seem to have taken up permanent residence on the lounge chairs of coffee bars. And yet, in the dull winter light that frames their steaming cups of coffee, it’s easy to see that there’s an indefinable, inexplicable spark to their relationship. Perhaps it’s just the way they lean into each other as they bantered. Or the casual manner in which Somak reaches out and tucks away a stray strand of hair on Prachi’s face. Or the luminous animation that radiates their faces. Whatever it is, it’s hard not to miss the fact that this couple is just so into each other. So, what’s their secret?