Yasumi Junta once made a promise long ago, one that has led him on a path to become a doctor. Now a high school student with extreme motivation to see that promise through, he suddenly finds himself put in an undesirable position. However, the reward that comes with overcoming this obstacle outweighs the negatives...or so he thought. Tasked by a doctor to take care of his granddaughters, Junta must do whatever it takes to make sure they graduate high school. Whether it's through academic tutoring, providing emotional support, or simply being there to give them a hand in times of need, Junta will not fail this mission. The only problem? They're triplets! Can he complete his mission and get the letter of recommendation he needs? Or will something else take root between him and his charges?