37 Degrees Celsius no Boyfriend / 37°C no Boy Friend / 37℃のボーイフレンド / Haru ni Naru Made Matte / Tsukiakari no Himitsu
Rank: 18211th, it has 90 monthly / 1344 total views.
Authors: Minase ai
Genres: Manga / Shoujo / Drama / Romance
Status: Ongoing
Summary:
1-3) 37°C no Boyfriend
Wakaba got locked up in an elevator with a completely strange guy. Moreover, they happened to share a kiss. He's someone she'd never meet again... or so Wakaba thought, but it turned out that that guy, Chitose, is the boyfriend of Nao, her friend!
Nao introduced a surprised Wakaba to her upperclassman in her club, Takaomi, but no matter what, Wakaba can't forget about Chitose...
- Awakened Memories

4) Secret in the Moonlight (Tsukiakari no Himitsu)

5) Wait Until Spring (Haru ni Naru Made Matte)
(Also included in Houkago, Kimi to Koi o Shite. -
( https://bato.to/comic/_/houkago-kimi-to-koi-o-shite-r4223 )