Mahoutsukai ni Kubittake!

Sen, who left the athletics team due to an injury, finds himself with a lot of free time. One day, he chases a strange pig and encounters Masamune Oku, a sophomore who claims to be descended from witches. Masamune tells Sen he has uncontrolled magical abilities and offers a deal: if Sen becomes his slave and gives him his powers, Masamune will let him fly, fulfilling his childhood dream. Sen agrees, but soon learns that transferring his powers requires "sexual acts." When he kisses Masamune, he feels physical reactions, possibly due to the contract's effects. Now, Sen must decide whether to pursue his dream of flying by engaging in intimate acts with another boy. The story follows his internal conflict and the evolving dynamic between him and Masamune.