My Girlfriend Cheated on Me, and Now My Flirty Underclassman Won't Leave Me Alone (Light Novel) Vol. 4

With Yuuta and Reina’s cheating scandal having finally been resolved, their relationship evolves into one of friendship. However, with the ground now clear for new love to blossom, the flirty underclassman, Shinohara Mayu, steps in with a proposal. Still unsure of what it really means to be in love, she asks Yuuta to be her boyfriend on a trial basis. But after having already settled into such a close friendship, will the two be able to see each other as something more?