*Imu has two different birthdays in the manga and a later released guidebook, so she celebrates twice! The February ones comes from the guidebook, the April Date comes from the manga (likely outdated).
March:
2.03 - Hinoki Nozomi (Our Hero Studies)
3.03 - Kurusu Yayumi (Our Hero Studies)
3.03 - Daigo Domon (Kanata Seven Change)
4.03 - Teruhashi Makoto (Saiki Kusuo No Ψ Nan)
7.03 -Jaga Yokota (Saiki Kusuo No Ψ Nan)
3.10 - Kimura (Our Hero Studies)
24.03 - Saiki Kumi (Saiki Kusuo No Ψ Nan)
25.03 - Saiki Kumagoro (Saiki Kusuo No Ψ Nan)
April:
10.04 - Shinoda Takeru (Saiki Kusuo No Ψ Nan)
12.04 - Takahashi (Saiki Kusuo No Ψ Nan)
12.04 - Koriki No.2 (Saiki Kusuo No Ψ Nan)
13.04 - Imu Rifuta (Saiki Kusuo No Ψ Nan)
15.04 - Mera Chisato (Saiki Kusuo No Ψ Nan)
24.04 - Mikami Aiko (Saiki Kusuo No Ψ Nan)
May:
5.05 - Ikari Keinosuke (Kanata Seven Change)
9.05 - Nendou Riki (Saiki Kusuo No Ψ Nan)
13.05 - Saiki Kuniharu (Saiki Kusuo No Ψ Nan)
14.05 - Saiki Kurumi (Saiki Kusuo No Ψ Nan)
19.05 - Kongou Tsuyoshi (Saiki Kusuo No Ψ Nan)
24.05 - Yoshida (Our Hero Studies)
June:
6.06 - Iridatsu Yuuta (Saiki Kusuo No Ψ Nan)
8.06 - Oono Ishio (Our Hero Studies)
10.06 - Haganeno Ken (Our Hero Studies)
10.06 - Yarizaki Hideo (Our Hero Studies)
11.06 - Yumehara Chiyo (Saiki Kusuo No Ψ Nan)
14.06 - Kouki Sawakita (Saiki Kusuo No Ψ Nan)
16.06 - Saiki Kuusuke (Saiki Kusuo No Ψ Nan)
18.06 - Hairo Kineshi (Saiki Kusuo No Ψ Nan)
19.06 - Zolbe (Saiki Kusuo No Ψ Nan)
27.06 - Nakanishi Kouta / Chouno Uryoku (Saiki Kusuo No Ψ Nan)
A WIP version of the masterlist has been added and pinned. I will be focusing on gathering info about Shinseiki Idol Densetsu and the one-shots that have recieved an english translation first.
I'm currently waiting for my 2in1 volume of Our Hero Studies. It will take more time to read and collect info about it, since there is no translation for this series (except for 3 first chapters). I would buy the ebooks, but I'm getting short on money.
This means that ShinIdol and the translated one-shots have the highest priority right now, since I've almost finished reading them all.
Have this panel of Yarizaki Hideo and Haganeno Ken for now! (≧∇≦)/