Mausoleum of Happiness

Welcome to Mausoleum of Happiness, a story about six college students named Riya, Rimi, Rahul, Satwinder, Nishant, and Atul who are still pursuing their degrees, and a farmer who is travelling with them and involving himself in their debate. Is he a spy or a simply impoverished man who has lost touch with reality?
Is Rahul truly in love with Riya, or is he just passing the time?
Why Mangalram said, "During my life, I have shed many tears, but this is the first time I can remember experiencing tears of happiness."