Have 25 Love Rays active on you simultaneously.
So here is demo video of this achievement: http://youtu.be/PvXMC4-bhl0You will need 8+ players with Manufactured Love Prism (Because prism has 1 min cd now and Love Ray will drop after 10 secs) 1 person is target and 7 other will use prism. 6 is way too risky...
Can get Manufactured Love Prism from Lovely Merchant for 40 Love TokenRewards True Love Prism in 6.1. True Love Prism will also give Love Ray buff but this toy has 5 min cd, so it is kinda useless