sanae is a good girl, etc

Everytime I look at Suwako I'm reminded on the luckiest guy that knocked her up.

Neither said:
Everytime I look at Suwako I'm reminded on the luckiest guy that knocked her up.

That guy is Kanako.

*looks to the right* This one's too big.

*looks to the left* This one's too small.

*looks center* This one's just right.

Neither said:

Everytime I look at Suwako I'm reminded on the luckiest guy that knocked her up.

What is that some comic? Also, I'd love to hear you explain to those who aren't familiar so much with these three, how exactly this "lucky guy" knocked up the girl on the left. On the LEFT.