If you're looking for manga similar to Koi to Sentimentalism, you might like these titles.
Fujimori and Matsuda attended the same high school and college. Unbeknownst to even himself, Fujimori had made it a habit to hang around his senpai under the pretext of enjoying the delicious sweets that Matsuda was so good at making. But after Matsuda moved to Toyko for work, Fujimori cut off contact with him. 5 years later, they reunite unexpectedly and...
30 year-old Odu is feeling left out. His friends are slowly marrying off and with his tiny salary as a video store clerk, he can't afford to go on trips with them when they can all hang out. Oh, and just to top it all off, his popular friend Araragi just found out Odu's most embarrassing secret... Odu's still a virgin at 30, but maybe it's not so bad after all because Araragi's never been with a girl either?
Minami, a gay fortune teller, has had a crush on his schoolmate, Kitahara, since high school. Kitahara, who has been divorced three times, asked to stay over at his house for a while, and so they started living together. Minami was convinced that Kitahara would never fall in love with him, but the new "crush" Kitahara found was, surprisingly, a man. Taken over by his feelings, Minami ended up kissing Kitahara!?
“The places that you like, I will bite on them all” He does not understand what goes on inside the mind of his cool-looking classmate. He was going to make love to him but he got fucked instead!? Both his mind and his body melts away under the caress of this person that he hates so much.Eichi is a university student who likes to hang around flashy people. He gets irritated by the fact that Jinno is always silently staring at him without saying anything every time they went to a drinking party. Eichi successfully got Jinno drunk to the point of getting sick one night however, he was unexpectedly appointed to look after him. Not only that, Jinno pounced him while at the pub’s toilet—!?
Two strangers were dumped by their girlfriends at the same place and same time. They ended up having dinner and spending the night together. Nothing really happened other than a love confession the next morning. Later, they met at the workplace again...
A story about an excellent and manly salaryman, whose beauty is extraordinary. the senpai Kitagawa-san and his, although dumb, but very handsome kohai, Nakamura-kun. In the middle of the night with a bottle of sake, a very girlish confession, and backed up with his very own fantasies and undeniable desires, he jumps his sempai Kitagawa-san... unexpectedly though Kitagawa-san doesn't have anything against it!! Two young boys, two love birds start the beginning of their love story!
“Your love will come true if you wear clothes from Sturm.” Ooba works at the rumored clothing store, Sturm. And he’s started a physical relationship with the owner, Miya. After a while, Ooba starts hoping to obtain not only Miya’s body, but also his heart, however…?
Per a request from his assistant to get his house cleaned, ero manga artist Asahina—nickname Hina—hires a cleaning service. However, the person who shows up is actually Asahina’s beloved Sahara-senpai from his junior high days! Sahara was cool, able to do anything, but was just a bit mean. Hina, who loved that Sahara, made a brave decision. On the day that he was supposed to transfer schools, he confessed! But instead of waiting for a reply from Sahara, he ran away… After that, ten years later – their reunion becomes a nightmare?!
Kei is a super-popular, charismatic model with an attitude. He could have anyone he wanted, but he has his heart set on Nanami, his awkward cousin and roommate! Nanami can be harsh at times, but Kei sees that deep down, he's actually a sweetie who worries about people; he just can't express it. Kei thinks that's just adorable, and he's tried so many times to make Nanami his, but there's a reason his cousin never takes him seriously...!
Yagami Haru works at an advertisement agency. Haru admires his boss, Ryou, but Ryou is very strict with him, never smiles and always criticizes his work. This frustrates Haru even though everyone else at the office seems to realize that Ryou actually cherishes Haru and is being protective of him. When Haru is entrusted to negotiate with a new client he meets their representative, Shibata, and is immediately attracted to him. That's because Shibata looks and acts exactly like someone who rejected Haru 10 years ago! The two men start seeing each other, but it seems like Shibata has ulterior motives? Meanwhile, Ryou is annoyed to hear that Haru is going out with someone and on top of that he just received distressing information about Shibata. What will happen when Ryou confronts Haru?