Chocolate FePSIvle! is the thirty-eighth chapter of Volume 4 of The Disastrous Life of Saiki K (Saiki Kusuo no Sai-nan) published on the 2nd of May 2013.
Reita was excited for the Valentine's Day and asked Kusuo if he were to get any chocolates. Signing a zero with his arms, Reita misunderstands it as a 'YES' to which he doesn't really mind since the latter is happy. Meanwhile, Kineshi was having hard time receiving some chocolates and noted to Kusuo how regrettable it was for him to not to able to at least get a honmei chocolate not knowing that the last guy who gave him a chocolate is a honmei chocolate. In the classroom, Shun was frantic after finding chocolate under his desk especially seeing the name of Kokomi and when opening it, he instead found out it was a fake Valentine's Chocolate from Riki. Shocked at the sad reality, Shun wept on the corner while Riki teases him. That didn't last long as a girl calls out for Shun, asking if he have time. This time Riki was the one sitting on the corner, something that Kusuo thinks that there are things that not meant to be done like this. On the other hand, Kokomi struggled to get away from the crowd of men trying to get her chocolate, something that she's at as she wonder who was the person that announced that she was carrying a chocolate. Hiding in the restroom, Kokomi ponders on the chocolate she's going to give Kusuo, and made an exaggerated conclusion that if her fans learns she gave the chocolate to Kusuo, he might die or worse war may occur so she decided to just throw the chocolate on window of which Kusuo caught saying she's just exaggerating.