Kyou, Sukitte Iimasu

University student, Rintarou, is in love with his rental boyfriend, Asahi. Knowing that it is all pretend doesn't stop his heart from racing when confronted by Asahi's kindness. Every time they meet, his feelings continue to grow stronger. One day, as Rintarou finds himself unable to make another rental appointment out of concern he won't be able to stop his feelings from growing, he stumbles across Asahi in town. While Rintarou is taken aback by the uncharacteristically serious look on Asahi's face, Asahi starts leaning in for a kiss...?!

(Source: Frontier Works, translated)