Love and Heart Series by Chitose Kaidō

After a messy breakup, college freshman Yoh Yagisawa returns home only to find she has an unexpected male roommate! Introducing himself as her old childhood friend who moved abroad, handsome Haruma Hirose is back to do a homestay. He's totally hot, super nice, and always there when Yoh's in trouble... but could Haruma's timing be a little too perfect? Plus, the house next door, where he claims to have lived-didn't the family there all commit suicide...?

Having eased her doubts a about Haruma, Yoh starts to relax around him, not realizing that he was actually behind the stalker incident. But when Yoh begins to assist the University Students’ Union, she finds herself in trouble once again. The group’s vice president, Kunie-senpai, has a grudge against her—and he’s threatening to take it out on Sawako if she doesn’t do as he says! In desperate need of help, can she bring herself to rely on Haruma?

In the aftermath of the incident with the Students’ Union, Yoh and Haruma quickly grow close. But even as that happens, they have a chance reunion with a former classmate, Wakana. It seems she was interested in Haruma…? Meanwhile, Yoh's best friend Touya realizes his own feelings?! The tangled web of love rapidly spreads!!

After being confessed to by both Haruma and Touya, Yoh’s heart is in turmoil. Meanwhile, Wakana, showing her true colors, reveals her plan to trap Yoh…? In an amusement park where each of their expectations clash, what will Yoh decide!? The story reaches a new stage with the conclusion of Wakana's arc!