To celebrate the office working, death metal singing red panda's birthday; here's Haida nervously giving Retsuko a birthday present, just like Flat giving My Melody a Valentine's Day gift: https://www.deviantart.com/legoboy186/art/Flat-s-Valentine-s-Day-Gift-to-My-Melody-785591093. But don't worry, Retsuko seems to be happy that she gets a birthday present from someone who works at the office, since there are a couple people who treat her like dirt, especially the boss Ton who gives her a lot of stressful work.