Kiss De Egaku Ittousei summary:

Chitose can’t take his eyes off the guy from the class next door, dozing off in class by the window. Each time Chitose leans out the window to sneak a look at him, he’s always there, dozing off as expected. His name - Seno. He’s a year older, but according to rumours, he was absent for a year because he was involved in a fight.Chitose is a friendly and sweet-hearted high-schooler and Seno is a mysterious guy. The two polar opposites gradually open their hearts to each other…A chaotic and heartwarming school-love between a cheery puppy and a questionable grade repeater.