Mei was able to create a new device that is capable of reading someone's life energy by simply sticking their finger inside. She unfortunately made the devices hole slightly too large for most people's fingers. Still wanting to test the life energy reading without starting over, Mei convinces Izuku to meet her in the storage room for a little favor. After explaining what her device does, he agrees to help her test it. Mei immediately unzips Izuku's pants and starts using the device on his cock instead. After some testing, she decides to thank Izuku the best way she can.